It also was a convenient attack on various regulators that Musk personally disliked and the GOP broadly have been wanting to gut for years.
I'm fairly sure that was Elon's main goal, slash the ability for regulators to get in his way because they've been a constant minor nuisance to him and he saw a chance to hamstring them going forward even if Democrats get back in power soon the agencies will have a drastically reduced investigatory and regulatory efficacy just from losing the people that know how to do it.
https://www.latimes.com/business/story/2025-03-27/elon-musk-...