Why perma-ban when the problem is only in chat ?

If the punishment system is gradual, shouldn't the chat restrictions lead to a **_Perma-mute_** instead of a perma-ban. Because someone toxic is different that someone who's griefing or feeding, and they could simply be given a permanent chat restriction to solve the problem. While if they start griefing even after being muted, then ban them. That way there would be way less toxic people, as well as way less people getting banned.
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