The question of "Why would any great coach want to come here right now?" is extremely idiotic.
We've got an extremely talented roster with some shit head coaching. We are the clear leader in regards to in-state recruiting. Aggy is forced to recruit New fucking Jersey even while Tom lays a 7-5 egg. They're going 6-4 at best this year, so their 2022 recruiting won't be much better than 2021 and will be easy to recruit against as a new head coach with success you can point back at and show off.
We still have the most money in the country, backed by BMDs who will pay the fuck out of you if you win. It'd be hard to turn down an offer when there's that many zeros on the page.
The way the behind-the-scenes people have been setting us up for nothing but success on the NIL front has been second to none. Already establishing programs to get these kids to make and continue to make money off their name, image and likeness is getting ten steps ahead 99% of other programs. The work on that front makes recruiting that much easier when we can tell a 5-star "Come here and make six figures while in college like it's nothing, and on top of that, we'll teach you how to manage and invest it."
The issues with the program are currently 100% Tom Herman's fault. Not anyone behind the scenes, not poor talent/recruiting, not a shitty AD, it starts and ends with Tom Herman. Someone like Meyer could come in here and be successful instantly.