Hum, you make claims of this will get you banned and this won't. What are those assumptions built on?
I'm not saying it's not the case, I don't use Twitter and don't know their processes.
That said, in my work, we deal with similar scenarios. Normally, you look for trends and you have different levels of enforcement for different risks.
So say you have automated systems doing monitoring which flags and alerts of possible bad behavior. Normally these are scored and categorized. For some score and category, you might take an automatic actions. Say, block the comment from posting at all and tell the user to reword in a non hateful manner their idea. Or you delete the comment. Now these infractions go towards the account. When there's many if them, indicating a trend, it promotes the account for manual review.
At that point, a person does a holistic overview of the account and its infractions. If they can reverse some if them, feeding back into the automated monitoring and alerting to improve its false positive rates, and they can confirm them, to add weight to those labels. Finally, they can choose to contact the account holder to justify themselves, give them a warning, take partial enforcement like deleting certain posts, or outright ban them.
Even the ban has degrees. You could have the account ban, but be allowed to create a new account. Or you can be banned with cross account detection, so your IP, email, address, credit cards etc. are all banned to make it hard for you to even sign up again.
And the processes in place and their rules are constantly adjusted and reevaluated. And there's even backfill mechanisms, so if rules are relaxed in the future, prior enforcement can be reversed if they no longer hold against the new rules for example.
Would you find that if say Facebook or Twitter were to operate in a somewhat similar fashion that it would seem reasonable?