Twitter is a cesspool so ruining what it is is a positive thing. It cannot get worse from here. At worst, it dies; at best, it returns to its former glory circa 2012. Both sound like wins to me.
It's a huge undertaking, that's for sure, which is probably why Musk wanted to back out. But $44B may seem like pocket change if it can get Facebook, Instagram, or TikTok level engagement and monetization. Twitter has been stagnant for a decade and the rot has set in.