Maybe? I distinctly remember doing my utmost best to ignore TV ads between my cartoons as a kid. Especially <10yo I'd be basically chanting "boring boring boring" to myself until it was over, or just stay focused on toys.
Then again, today's children have access to Youtube far earlier and with more control over what they watch, so you may have a point in that they're starting earlier and thus it gets normalised instead of "this is a sucky thing I'm going to try to ignore".
Just like parents have a responsibility to teach their kids about safe sex, I think parents have a responsibility to teach their kids about ad-blockers.
Mainly because to an extent they are a necessary evil, or at least we'll never convince enough of the right people that they aren't necessary.
> Ads are psychological manipulation.
They are currently, which is why they get blocked by my anti-stalking-and-other-dickishness kick, but they don't have to be. A simple advert (image and a little text, not directly obscuring what I'm trying to read or bouncing around to break my attention from elsewhere artificially) for a product that might be relevant to what I'm looking at, doesn't seem evil to me. Unfortunately advertises are not satisfied with that and want full-page adverts with forced interaction and full user background tracking.