"On Blindly Accepting 'Authorities'..."
Just for fun, not meaning to step on anyone's toes here...
My Dad (DOB 1921) was a hell of a fine shooter. Early on, he decided the ideal career for him was to be an exhibition shooter for one of the big ammo companies. So, his spare money went to buy .22's, with which he practiced lots. Then, in his Sr. year in military school, he ran the firing range while everyone else had Drill and Ceremonies practice for an hour a day, every day, for a year.
During that hour, he had all the free .22 ammo he wanted to shoot. Located way out in the country, aerial shooting wasn't frowned on, and he started tossing up lumps of coal from the coal pile. Soon, he was hitting the lumps and some of the resultant fragments still in the air.
He moved to smaller and smaller targets, and by the end, he could hit 2-3 empty .22 brass per throw on his better runs. Then to the University of Kentucky, and he just HAD to be on the Infantry Reserve Rifle Team... Heck, it was 1939, what could POSSIBLY go wrong?

Graduating in 1943, he went to Infantry OCS as contracted, and qualified expert with everything they had except the M1 Carbine (which had a crude, non-adjustable L-shaped rear sight at that time.)
Well, the "Salty Old NCO" who taught pistol marksmanship introduced his new class to the 1911A1. He spouted the usual drivel about how "inaccurate" they are, he'd never seen anyone ever shoot a perfect score, and yadda, yadda, yadda. "WHY, IN FACT, I'LL GIVE 20 to 1 ODDS on a bet with anybody here that they can't shoot a perfect score..."
My Dad had never shot a .45, and having grown up in the Depression, he didn't want to risk any money, so he didn't make the bet... and he then easily shot the first perfect score "SGT OLD SALT" had ever seen!
I chided him about it (much later, of course!) saying "GEEE, you couldn't even bet ONE DOLLAR? You'd have had $20!" Well, that was what he got for blindly accepting the hoary myths propagated by people who were supposed to be "Ex-Spurts."
There is a lot of good info here, and the stuff that is specific -- re: thinner forcing cones of some models, 125 gr's (which have a much shorter bearing surface length than 158's, thus transitioning the gap between cylinder and forcing cone much differently), etc. is all very helpful in putting together an informed plan about shooting one's Model 19.
But, as always, beware the "range experts" who talk more than they shoot, when it comes to parroting popular things "Everybody Knows." I can't imagine not shooting my model 19's just for fear they might magically disintegrate!
John (Distinguished Marksman x2 -- Service Pistol and Service Rifle, both accomplished as a Civilian with iron sights, on my own time and my own dime, well before the appearance of "optics"...)
FWIW, in line with my Dad's experience, I've personally found the rack grade 1911's I've shot to be fine for their intended purpose...