Depends A LOT on what kind of content you're watching.
I've been studying physics lately and a lecturer talks slowly so 2x makes a lot of sense. Maybe even I know the subject somewhat but I believe the lecturer has a few insights or connections to point out that I haven't seen. But perhaps it's burried in the middle of the lecture. It really doesn't make sense to listen to the whole lecture at 1x speed. Much better to 2x to the "unfamiliar part" and then rewatch and carefully consider that part at 1x speed.
Also, some very intelligent people just speak/think slowly. They have interesting things to say but slowly.
On the other hand, if you're watching a highly-produced video (such as a movie), I think it's quite ridiculous to watch it at any speed other than 1x. It was paced that way for a reason (if it's worth watching).
I don't really understand why folks have to be so "binary" about playback speed.
To me, it just feels like when I scan some text with the eyes looking for the juicier parts or hooks that I most care about. Speaking of which, I much prefer to consume content as text than audio or video. I can scan, seek, pause, think, go back at will without fiddling with any controls.
Other times you just want to skim through the content, for example if you're already familiar with the topic, although you could argue that it's not really worth spending time on skimming something you're already familiar with.
But I definitely agree with the "quality filter" part. There's so much content out there that just doesn't have much substance to it.
I don't need to hear more content more quickly, it's just that some readers/presenters talk very slowly and my ears find the cadence - not the slower reveal of information - a bit frustrating.
Music and general pace of life are slower too.
Not sure why I should confirm exactly to the one speed that the creators of the media choose. Certainly my motives for choosing the perfect speed will differ from that of someone who has a capitalistic interest in mass consume of theirs product.
I have attention deficit. For me adjusting speed is an a11y feature to put load on my cognition so it doesn't wander