Your thread title is still a load of bollocks. The "sole reason"? He didn't sing lead on the track. He didn''t play keys. He didn't play the drums. He didn't play bass. He didn't produce it. He didn't engineer it. He didn't mix it. And he didn't even write it all by himself.

He co-wrote it, and fought for it to be on the record. Producers do that stuff all the time, and they're hardly "the sole reason" a band blows up.