Perhaps he just manages to see some potential, and lives in the secure knowledge that one day these guys won't be awful. By that time he will have secured his place, and will have furthered his control. Maybe he is xenophobic, or would rather play with kids than disrupt routine. All this is speculation, but if it had any truth you'd be better without him.
The reasons ate endless, and i hate to point out something so simple, but why not just ask the fellow? Perhaps he might even have criticisms of your band.