The reason Gunn didn't want to use Cavill as Superman was cause he was too old right?

I mean Gunn is already using John Cena for Peacemaker in this new DCU as well so I don't really see why he couldn't have taken Cavill for a few more movies even with a different tone for the character, he couldve auditioned and tried it out. It's not like Cavill wouldve said no... but like idk did Gunn just not hire him cause of his age or another reason?

I don't hate David (I loved that movie even more than MOS) but like its just a question that popped up...