I don't really think any of the problems people cite about game dev YouTube are endemic to YouTube or the YouTube format. Most game dev advice is awful, and most discussions about 'game dev' online are from a profoundly uninformed perspective. Poke your head in /r/gamedev for a sec if you really want to stare into the abyss; it's a truly Boschian hell of the ignorant giving advice to the disinformed.
And the industry doesn't really help this situation. If anything, it makes it worse in several ways.
First, knowledge is actually gatekept. I don't know how we can argue that it isn't when most GDC talks are behind an absurdly expensive paywall – nevermind the expensive ordeal that is attending GDC.
Second, I do think a lot of industry people have forgotten what it's like to be a beginner and are very eager to push people towards solutions that are practical for a real professional team but are not really relevant to someone trying to just make a crappy first game, join a game jam, or develop very basic and early skills.
Third, the industry has done very little to discourage the grifter industrial complex built up around game dev. The industry keeps supporting GDC, an event that is extremely friendly to grifting. It hasn't really done anything to distance itself from the various for-profit schools selling kids on 'game dev degrees' that the industry often doesn't take seriously when hiring.