I agree with everything you have said Denis. All my centerfire guns wear adjustable sights as well as my Mark II Ruger .22. Since I have pretty much settled on loads for them all, I haven't adjusted the sights since 1993 or so.
It is strictly my opinion, which I don't expect anyone else to share, the adjustable sights on a Bearcat are a little bit easier to see but unnecessary (and butt ugly).