If people were exclusively running canned adventures, I would agree.
I specifically avoided games using pre-written adventures. I wanted to see what GMs were doing.
I found all of two games starting at higher level, and only got into one of them (which, of course, died an early death, as I have said elsewhere). 5e GMs simply do not want to start at higher levels, and those I felt I had any hope of persuading to do otherwise always flatly refused. Sometimes neutrally, sometimes condesecendingly, sometimes with hostility. But they always outright and unequivocally refused.