I also hate the silliness of claiming that providing lifeboats for people that want to leave Twitter is some type of moral failure. The silliest I've heard is "Fast and easy is how you get Trump!"
No.
Stop being silly. Just fix the onboarding. There's nothing noble or pure about having poor UX, and no safety features so Black women can't find their friends and then get yelled at by nazis. It's not pure. It's just a bad product. Fix it.