Chaosmancer
Legend
There is so much more out there, even within the core 5e ruleset, and I wish WotC would embrace just a little bit of that, so all those new players that dropped in their laps in the last decade actually saw something more than the most popular way to play. As the market leader, WotC could do that if they want a healthy hobby.
Who says that those players DON'T see more than just the most popular way?
Do you realize how vastly different a Ravenloft game is from a West Marches game from an Eberron game? All of those are different ways to play, and new 5e players can be exposed to all of them. Some group in the middle of nowhere is playing a new version of the game that no one else has seen yet, and you might stumble upon it on a random blog post and think "Oh, that's a really cool idea". There are dozens of ways to play DnD currently being played right now.
The problem for you is, none of the ones getting attention are OSR style games. But... there is an entire OSR community, doing what you want them to do. So... how is the hobby unhealthy? How is having WoTC drop a 500 lbs hammer into the OSR space going to make that space better?
You phrase this like there is some dire threat or wasting disease inflicting RPGs that only WoTC making multiple OSR products can fix... but that just isn't true.