Oh yeah? When I bought my brand-new Smith & Wesson Model 19 Combat Magnum K frame revlolver back in 1980, it jammed on me during the first outing at the range. The piece of crap S&W (lack of) Quality Control didn't locktite the ejector rod, so it slowly backed out with each shot until it was jammed against the barrel shroud and I couldn't open the cylinder.
You never locktite the ejector rod on a S&W revolver. It is assembled with dry threads and torqued to spec. The QC problem was due to improper torque. This (improper torque) was also the reason for other S&W revolvers (probably the same vintage) to have cracked frames due to barrels being too tight, and barrels breaking at the threads and falling off during firing.
That said, revolvers can and will jam, just not as often as bottom feeders. A worn M-19 will lock up tight if the nose of the trigger that contacts the cylinder stop has excess wear. Bullet pull due to recoil is a revolver killer as well.
Also, too light (or broken) trigger return spring will lock the trigger in the rear position after firing.
Also, a pierced primer or broken firing pin on a revolver can lock one up.
Also,......etc....