To the best of my recollection, the damage issues also involved LE agencies which shot a TON of ammo. NYSP comes to mind. They shot a lot of full charge ammo in academy and in-service training - way more than most other agencies, as a result of some bad litigation outcomes over their training in the 60s. (At least they took the right path over the litigation outcomes instead of wringing their hands and whining like most LE agencies.)
I had a couple of troopers and an agency lawyer describe their program to me. A brief intro to shooting with .22s (1 day), 1 day of .38 wadcutters, and then nothing but full house ammo thereafter, both in the academy and after. They would shoot their K frames loose, but it took a lot more ammo than most of us shoot. (I want to say it was somewhere over 5K rounds to failure, maybe 10K, but my memory is questionable. I have no idea if they still do that volume - that was years ago, before they left revolvers behind. I'd hate to think what it costs, although it would be a lot less than lost officers and bad lawsuits, even if one included the cost of a 5 year or so service life and replacing the guns.)
While I would not want to make a habit of a lot of shooting of those hot 125 grain JHPs in a K frame, I would not hesitate to shot enough of them to be confident, and then carry them for serious use. It is not a "fun" load to shoot, at least for me - but it has a good reputation. (If I recall right, the really hot load was the Remington SJHP 125 grain. I may still have some around. The flash even during the day was staggering.) I don't think NYSP carried those; my admittedly flawed memory is that they had some 158 grain HP back then (late 70s, early 80s).
The 125 grain .357Sig load is similar to the old .357 Magnum 125 grain in velocity, etc, and also has a good reputation as a stopper. I carry it in my G33, but again, it is NOT fun to shoot, especially as I get older. The first time I shot that pistol, I put about 150 rounds through it - loud, staggering blast, etc. My hand was red the rest of the day, with the imprint of the grip pounded in to it. However, I don't recall it beating up my shoulders as a few hundred rounds of .45ACP does now.
I would not be too worried about 1000 total rounds of that ammo through a K frame. However, if you want to shoot a lot and maintain proficiency with carry ammo, you may want to look in a different direction.