While I would prefer a semi-auto pistol for a defense situation, I feel a revolver offers much greater versatility for learning to shoot well, hunting, and for a general purpose pistol.
There are several revolvers on the market which allow you to use multiple calibers in them--yes, you can do this with an auto pistol too by changing out the barrel, but I'm talking about shooting different calibers without changing parts.
You can shoot 10mm and .40 S&W in a 10mm revolver, .357 Mag and .38 Spcl. in a .357, .44 Mag and .44 Spcl. in a .44 Mag, .22 S,L, and LR in a .22 LR...the list goes on. This offers downloaded versions of the hard-hitting calibers for practice, as they recoil less and are often cheaper. Downloaded versions in an S/A pistol require the case length be the same, and still will not usually cycle the action.
Wheelguns are easier to learn to shoot and clean. They also tend to have stronger actions and allow for the use of bullets which may be more easily deformed when crammed into a magazine; i.e. those with lots of exposed lead.
I don't believe that revolvers are inherently more accurate. Most well-made autos and revolvers are close enough to each other in performance not to matter, however they do eliminate the possibility of the "first shot flyer" which results from hand-cycling the action of the autoloader.
Some cartridges, especially rimmed ones like the .22 LR, work much better in revolvers. A 9-shot .22 LR revolver is probably even faster to load than snapping cartridges into a 10 round S/A magazine.
The autoloader does have the advantage of a much faster reload and greater magazine capacity.
I think everyone should learn how to shoot (and if possible, own) both types of pistols.