I see in the help builder that an argument used in multiple commands is flagged as optional in usage help

            bool IsOptional(Argument argument) =>
                IsMultiParented(argument) ||
                argument.Arity.MinimumNumberOfValues == 0;

Is there a reason for this? We reuse arguments when it makes sense between commands, and they are still required.
I believe this is a bug unless I'm missing something