User blog comment:FairyRaven/Fairy Tail Chapter 437: Magnolia, Review and Commentary/@comment-24744891-20150525132051/@comment-7418318-20150525140505

Maybe if he spent some time with the guild first, but right now nobody except for himself and Makarov know he was a Fairy Tail member to begin with.

I doubt the others would just believe him and vote him master if he turned up and said "Hi everyone, did you know I was a Fairy Tail member, but made myself forget it so I can infiltrate the magic council, where I did more harm to Fairy Tail than help them?"... you have to admit it doesn't make much sense to begin with. And even if it did, the others still have very little to no reason to trust Doranbolt at all... much less enough to put him in charge.