If these statements are true of your particular area and reflect some amount of correlation, then there is a possibility that this may be a...
Self-Fulfilling Prophecy: a prophecy that is declared as truth when it is actually false, which may sufficiently influence people, either through fear or logical confusion, so that their reactions ultimately fulfill the once-false prophecy.
-Instructors in your area tell new shooters it would be best to start with a revolver (opinion of those who favor revolvers)
-You see new shooters at gun shows in your area looking at/purchasing revolvers (following their instructors' recommendation)
-You relay to others the instructors' opinions and the result of those opinions as seen at the local gun shows (as though it was fact with supporting evidence)
-Over time it is generally accepted as "fact" that revolvers are best for new shooters (because some biased instructors say so, and because some unwitting new shooters take their biased advice)
"Opinion of those who favor revolvers"(?)--Well, no--none of the instructors I know favor revolvers. One, who is a county police officer and former head of the SWAT team and former police sniper, uses semi-autos only--but he responsibly recommended that a relative not familiar with guns who had received a death threat choose a revolver.
"This may be a...Self-Fulfilling Prophecy...declared as truth when it is actually false"(?)--That a revolver is not as sensitive to variations in ammunition or to possible magazine damage or to lack of lubrication is not "actually false." That a DA revolver will not fail to eject upon inadvertent limp-wristing is not "actually false." That some practiced skill is required to immediately identify and remedy a failure to eject, a failure to feed, or a failure to go into battery in a semi-automatic pistol is not "actually false."
"You see new shooters at gun shows in your area looking at/purchasing revolvers (following their instructors' recommendation)"(?)--I didn't ask their reasons.
"Because some biased instructors say so, and because some unwitting new shooters take their biased advice"(?)-- Do you have some evidence of bias? Any reason to suggest it?
So... how would a new shooter eventually get used to using a semi-auto?
Obviously, by shooting one, probably quite a bit, and practicing with it. Until they gain sufficient proficiency, however, they are essentially unarmed. It takes less time to become reasonably proficient with a revolver than with a semi-automatic. There are fewer operations and fewer things to go wrong.
One self defense book I read recently pointed out something that I had not considered. Many authorities, and a number of manufacturers, recommend not carrying a semi-automatic pistol until several hundred rounds have been fired, including, depending upon the source, some number up to several hundred rounds of the selected carry ammunition. That would have ruled out a .380 for defensive carry around here last summer, and the high cost of defensive ammunition could be a factor for many. My M&P Compact does not have a break-in recommendation, but many other models do. Nevertheless, I didn't trust it until I had fired several hundred rounds through it. I'd be happy to carry a revolver after firing fifty rounds through it--or if it were used, five rounds.
Are you implying that, after using a revolver long enough, a new shooter will eventually understand how to manipulate the parts and controls of a semi-auto? Your statement is completely illogical.
Actually, that was not my statement--just your strawman.
I think you are basically suggesting that "newbies" should just get a revolver to carry and not bother to actually learn anything.
Not sure where you got that idea. Before they carry
anything they should learn to safely draw, fire, hit the target and reload; learn the basics of self defense; and learn the laws in their jurisdictions.
The revolver vs. semi-automatic debate is a very old one. In larger chamberings, the revolver is much more difficult to conceal in normal dress. The revolver has less ammunition capacity--the main driver in its having been replaced in uniformed police service. Without the new loading aids, it takes longer to reload a revolver.
On the other hand, a revolver is much simpler to learn to operate and is less sensitive to problems with ammunition.
I have a revolver. It's reliable and it fits into a pocket holster very nicely. I don't like the limited capacity, and the long double action pull requires somewhat more frequent practice than my M&P--which, in turn, requires somewhat more frequent practice than my 1911.
That has to do only with practicing the trigger pull, mind you--I have over forty years of experience in using locked-breech and blowback semi-automatics, and I'm quite comfortable with their operation.
The newbie can't say that -- at the beginning.