Know-it-alls aside, I suspect that questioning someone's choice of equipment or technique is often a self examination.
Did I do the right thing? Did I buy the right scope/rifle/bullet/boots?
We constantly examine ourselves when something new or different comes along. It's never ending. To commit for life to a certain brand or technique isn't smart. Technology evolves. Knowledge increases. That means we're likely to change equipment, brands or procedures throughout our lives.