I believe it's a mistake to think people are just barely enjoying themselves or that they are enjoying themselves only because they don't know enough to realize they are accepting a diminished experience. Disney doesn't want people to find the experience just "enjoyable enough" to return. They want people excited to return, and despite what you see on some of these threads, there are a whole lot of those people out there. That's why the parks are crowded.
That's not what I was suggesting, although I suppose I can see why it would read that way. I was only pointing that it's not useful to compare the experience of someone visiting now with the experience of someone visiting 30 years ago if they haven't done both; I was not saying it's impossible to enjoy the parks as much (or more) now as then.
A diminished experience is relative. The parks are significantly diminished for me, but that's not a recent thing. They were significantly diminished back in 2010 too -- in fact, they're probably better now than they were then, other than the reservations/Genie+/park hopping restrictions -- but most of that is due to specific, objective changes and not any vague notions of crowding, service, and so on.
It's mainly the loss of attractions I preferred to their replacements and a loss of theming in the shops etc. (this is a big issue at the MK and especially DHS; the whole front of DHS used to be phenomenal) that make it worse for me. EPCOT was the whole reason I fell in love with WDW in the first place, and that version of EPCOT and its attractions are long buried.
But just because it's diminished for me doesn't mean it's automatically worse for newer guests. People want/like different things. Guardians looks mediocre to me but tons of people love it; they're not wrong to love it. It's subjective. I even fall into this category on Na'vi River Journey, which I think is a phenomenal C ticket and one of the best attractions they've built this century, and tons of people hate it!
Someone who went 35 years ago could still find the place enjoyable. This sort of logical dead end, of just assuming people are too dumb to act in their own best interest, is preventing you from fully understanding what is going on in the parks. It's far more complicated and diverse than the same tired arguments that get posted here every day.
See above, although I'll point out you're basically combining arguments from a bunch of different people and assuming they're all saying the same thing. I have never suggested people attending the parks are too dumb to act in their own interests or that people are objectively wrong to enjoy the parks as they are now.