Has you ever seen this screen?
I saw it a few months ago for about 24 hours. It sucked. Imagine not having access to your email for 24 hours, with nobody to reach out to and no info given. Although Google makes it seem like it’s your fault, it’ really isn’t. Chances are the server your Gmail account happens to be on is just having a bad day - there’s absolutely nothing you did to cause this, and there’s even less you can do to fix it.
But here’s how you can protect yourself from this unfortunate situation: just forward your regular Gmail to another Gmail address. It’s most likely to be on a different machine, and chances of both of your accounts getting locked down are very small.