While I agree with you, not every channel is big and some of the smaller ones might rely partially on this in order to get materials/sponsorship in order to be able to have the parts to do some projects they make videos on because it is more a passion project and they might barely break even or even make losses on doing it.

The context that I am thinking about is, for example, a small hobbyist that might rely on the added value for making some odd things, requiring exotic hardware, quantities of materials that could be prohibitively expensive or the lend of access to said hardware might be blocked behind viewership metrics, and there this might make some difference, and I personally enjoy those little odd channels and this is why I, as a viewer, might care about it. But again, I totally see where you are coming from.

For every one hobbyist making some kind of interesting video that they couldn't have made without ad money, there are 1,000 moronic influencers making the same video about the same thing, grasping at ad money or free products to shill. YouTube is 99% dreck now. Hooray for the hobbyist, poor us having to wade through the influencer swamp.