That already qualifies you as tech-savvy, lol. Going so deep as to know what Lemmy is is quite an accomplishment in itself. You don’t have to be an IT specialist, you should just know the most general details on what computer is and how it works instead of “magic box that runs YouTube” with latter being synonymous to “video”.
I reckon when Chrome fully switches to Manifest V3, most users won’t bother looking for alternatives - for them it’ll just be the end of an adblocking era. Then maaaaybe some of them will learn to switch. But very far from everyone.
Frankly, with the prevalence of adblocks everywhere, even on your grandma’s computer, this way YouTube can actually significantly increase the ad revenue.