NRA Life Member, Range Safety Officer, Basic Pistol Instructor
We are all working under the supervision of some very credible smiths here.Okay, so here my perspective...
You shouldn't have to "repair" a new firearm.
Any modifications should be done by a qualified gunsmith.
If you are considering buying a firearm that you think you will need to modify to make it "behave" the way you want it to,...Don't. Keep looking and invest in the firearm you are REALLY trying to find.
IMO: The bottom line answer regarding why this is an issue... It's a Tisas.
That is HOW one becomes "qualified".