Some live by:
“It’s/they’re wrong until proven right” or
“It’s/I’m right until proven wrong”
both based on their individual judgment often clouded by a stubbornness most often based on fear of admitting to be wrong - their linked self-esteem takes a hit.
These types of people will always be around. Recognizing them would help deal with them “objectively” which is much better than taking it personally
I believe a large majority of naysayers, many who refuse try themselves, are being stubborn to “not” spending above measurements because they don’t want to face the truth of unaffordability. Sometimes envy morphs to anger/indignant