Another option is to control the domain. That is what I recommend for any account that is used to make money in any way. In the event you have a dispute with your email host, you can simply change the domain MX records. You may lose a few hours or a couple days of email, but your name doesn't disappear out of thin air.
That can happen for sure. You should do as little business with your registrar as possible. No hosting, just a domain and a couple DNS records.
Your registrar is unlikely to do any automated patrolling and algorithmically stop doing business with you. Registrars don't have the profit margins to police every domain they own and the tech parse every type of content to decide you should be delisted.
If they do decide that you are too distasteful to do business with, it will likely be a person, responding to a complaint of some kind. That is a significantly lower risk than an automated google sweep or say getting your email turned off because your YouTube channel was tagged by a bot.