It wouldn't.... If you read what I said carefully I said
People cannot submit Moderator Applications when there is a current Ban request against them.
CURRENT Ban Requests, Meaning that as soon as it is resolved: They can submit a Moderator application.
So no, it wouldn't exclude him from staff forever, It just means that he can't submit a moderator application when someone has a ban request out for them, If you listen to my first suggestion that wouldn't be to long, at the most only a need to wait for 3 days.
I wasn't even close to suggesting that they couldn't submit a mod application forever, That is ridiculous.