I am sitting here thinking of what would happen if my Gmail account got blocked. The disruption it would cause to me is enormous.
> surely I am protected from this, right?
Nope. Google can disable you account at any time, without telling you why, and without giving you any appeal process whatsoever. No free-gmail user is in any way protected against this. People paying for Google Suite accounts are ever-so-slightly more likely to receive some support if anything happens, but that's it.
> The disruption it would cause to me is enormous.
This is why I'm slowly moving away from it (and everything Google, really). The service is extremely reliable, it raised the bar for email services and web UI, what they've done to spam is fantastic, but the possibility of losing such a key account and not have any recourse is now too terrifying to contemplate.