Does that mean they cannot "exclude those who they feel abuse their platform"? That is a tendentious, disingenuous question.
Does that mean they should be obliged to have a legitimate justification for such action, and offer an avenue to challenge it? Yes.
Does it mean the list of justifications should be subject to public review? Yes.
Does it mean that permanent bans for trivial, correctable reasons should not meet the standards of such public review? Yes.