But that’s not the same thing as being banned.
The right to be forgotten doesn’t extend to the lawful processing of information for reasons you might dislike.
And Facebook doesn’t delete all information related to you - only the information you provide. If a Facebook friend uploads their contacts and includes your telephone number they won’t remove your contact from their account when they remove your user, whether you ever provide Facebook with that number or not they will associate it with your user and it remains on their servers when you’re gone.
One big distinction that was missing in the OP was the difference between PII and public PII, email addresses and phone numbers are both considered to be the latter. Your right to erasure applies to the storage of personal data no longer being necessary, because the purpose for which they were collected or processed has passed - by asking to be deleted there’s no longer a need for that PII to remain on those systems. That’s entirely different to you breaking a user agreement and subsequent step of processing becoming necessary to exclude you.
What you’re effectively suggesting is that GDPR would allow you to break a contract and suffer no consequences, extrapolate that out a little - you could dodge debts and do all manner of unsavory things were that possible, which is why it isn’t.