The concensus seems to be that revolvers are more appropriate for amateurs. I respectfully disagree. If you take a hard look at the supporting arguments, many of the opinions seem to come from LEOs that trained in combat-style shooting.
How do you define an amateur vs a professional? Is it their demonstrated proficiency on a Q target or a B27? If you look at the current shooting games, most are action-style games, typically scored as "time plus". Courses of fire may range from "Bad breath" to maybe 25 or 30 yards. How would these "so called" professionals fare if their targets were overlaid with decimal scoring rings, and scored accordingly? How would these "so called" professionals fare on the NRA 2700/Precision Pistol course of fire with their chosen semi-auto?
Remember, revolvers ruled on the NRA 2700, and slid aside with the advent of the accurized 1911! And these matches were slow fire at 50 yards, and timed and rapid fire at 25 yards, typically shot single action. I was not a LEO, but a medically retired teacher that shot for fun.
I was weened on S&W revolvers (initially K22s and K38s) and 1911s. Back in the '90s I had the pleasure of cleaning a dueling tree with a Model 27 shot SA against a 17 shot G17. Speed-wise, I could clear a table of 6 bowling pins or a rack of six plates with that 27 against a G17, and not require a reload! Not aiming to brag, but just last weekend at the Adaptive Defensive Shooting Summit using a Sig P320, I was able to shoot an IDPA match dropping only 6 points in 151.34 seconds placing 14th out of a field of 39 fellow challenged shooters using only 83 rounds, with most exhausting the recommended 120+ round load out.
Most games today are not revolver friendly, and speed is valued over precision at much closer distances. When shooting for precision, it is unlikely that most polymer pistols will be competitive against a revolver with a revolver capacity course of fire. Increase the required number of rounds and look for faster speeds, and the revolver loses ground.
Personally, I would rather engage a semi-auto trained speed shooter at an extended distance than a revolver trained shooter using either a revolver or a semi-auto, I believe my chances of survival would be greater!
Plus, how many neophyte shooters today have an educated understanding of what they want to buy versus what the sales clerk recommends?