This is absolutely true for many topics. There is a threshold of expertise where opinion that does not meet that threshold has no value. There is also a large gray area where there is sufficient expertise such that the opinion might have value. And then there is some point quite bit after that where someone has sufficient expertise such that it is very important to take what they say on the subject seriously. I occupy the first two regions in almost all areas, possibly all. High school students occupy the first area almost exclusively.