If you really want to know why Musk would do that, this video by Benn Jordan sheds a lot of light on what's been going on with Musk and Twitter. https://www.youtube.com/watch?v=GZ5XN_mJE8Y
TLDW: Musk wants to expand his (and putin's) disinformation empire to control what you hear and think.
Musk wants to expand his (and putin's) disinformation empire to control what you hear and think. They rely on obfuscation to sway the narrative to push their agenda, and bots and deepfakes are an effective means to do that. https://www.youtube.com/watch?v=GZ5XN_mJE8Y