Really, you question a well know member's honesty and comprehension that knows much more about Mini's than you probably ever will.Obviously what you are stating is not true for everyone, lest this thread would not have happened. I guess your honesty, or comprehension, is an issue as well.
The guns I own that came with buffers still have them, those that didn't, including 1911's and mini's, do not. I think the designer knows more than you do about his designs needs.
Loads of shooters that don't subscribe to these forums have no idea that a buffer has even been suggested for their mini. And yet they all work just fine.
Have you tried a buffer, if not you have no room to talk.
Sandog and most of us have and still do, with a slim buffer you still get full lock up in battery and no short stroking.
This thread happened because the OP has a issue with the trigger group falling out and has not figured out the real reason, which has nothing to do with a buffer "Period".
As far as the designer knowing what's best does not mean it can't be improved. Lets see, the original design had a skinny barrel, took many years of real users asking for a better barrel. Ruger finally listened and they now come with a thicker barrel. They also added what they call a buffer but really is not and has been known to brake. The end users that know this install a real buffer.
Yes, lots of Mini owners know nothing of the buffers and yes they work fine.
But buffers make them work better and last longer.
By the way lots of 1911's come with shock buffers from the factory.
Buffers take up the shock of metal to metal contact, you can not tell me this is not a good thing.