I'm not so sure a Ruger Blackhawk can't take anything the best autos can and more. I can see where a DA could get its crane damaged, etc, if you were so inconsiderate of the gun as to run it over with a D3 Caterpillar or something. But, a Blackhawk is really strong. It does, of course, have that delicately timed lock work, I suppose.
As to outdoor use, revolver every time for me. I said I take care of my guns, means I don't abuse them. I ain't goin' to war and if I did, I wouldn't stop takin' care of the tool that keeps me alive.
Revolvers can handle a lot hotter cartridge than a normal sized auto. I'll take a 44 mag over any .357 sig. against a toothy predator, for instance. Revolvers are also more accurate in hunting guns.
Autos have their place, firepower, speed of reloading, etc. Revolvers are not an anachronism in self defense, however, no matter what your personal preference is. A DA service revolver in the hands of a man who knows how to use it is still a dangerous adversary to a man armed with a wonder 9. Don't ever under estimate a revolver's capability. It all depends on who's shooting it and how good he/she is with it.
IOW, I really don't care which one is "tougher". It doesn't apply to me so I don't care.