But they will make team friendly concessions when they choose to retire. Either because the choose to do it for an organization that has done a lot for them or because they get a few hundred thousand to do it.
Even a team friendly concession only gets you under the cap. It doesn't improve the team, give them more cap space or replace the retired player. Those all have to be accounted for.
There is a big difference between being cap compliant and having a good team.