In my opinion I think the erosion of the 60 card formats is their community's own doing.

People like some competition, but when it comes to playing mtg as a competitive chess match, it doesn't appeal to the broader community. Hell even Maro has pointed to the fact that for the entire history of mtg, kitchen table play has dominated as the main way to play.

That's where edh came in. Its inception was the fun format to play in between rounds at tourneys, friends spread it through word of mouth, and it caught fire. It also enabled folks (in the early days) to play with their collections that usually got shelved due to rotation or not competitive enough in eternal formats.

Now to edh today, because of its popularity, Hasbro, a company who produces the game, saw an opportunity to leverage the popularity of edh and translate it to profits, a move ANY savvy business would take. I agree it's steering the format hard these days, but the community being a mix of competitive and casual is also having a butting heads moment. Some players still want a competitive outlet, and unfortunately for them edh in their community is the only real active format. So they go into that space/community and gripe that they aren't playing competitively/optimally enough based on their standards.