I bought Rock Candy in the airport the other day (Oooh, I'm on holiday, go me), and yes, Steve totally throws Bruce under the bus re Only The Good Die Young. But hear me now, I don't necessarily think that it's because Bruce feels he can't sing it in terms of notes, as some have suggested or questioned.
Listen to it, it's quite hammy and performative. Maybe he just feels cheesy as fuck doin it. Not that he can't do it or doesn't like it but maybe just that as a 65 yr old man he doesn't feel the particular vibe for that particular song. Which is fine. Who are we to tell him otherwise?
All conjucture, fo sho but I reckon Bruce has a veto and he vetoed that song for reasons other than his capability to hit certain notes.