I’m fully aware of how MRSA came about.
My point was this: You will never outrun the microbes when you treat ‘disease’ by selecting against particular strains.
The microbes will win every single time.
I’m old enough to remember when suggesting that antibiotics had ‘stopped working’ in some cases was verboten heresy.
Which was met with suggestions to put antibiotics in the public water supply.
Thank G-d those nutjobs didn’t get their way.