So an argument that gets repeated in SvS and SvSx2 is that Thomas is unlikely to "win" the callback. This is Roman's territory - it's really up to Roman's ability and talents whether he wins or not. Yes, it's very difficult and not totally up to Roman, but the point that keeps jumping out to me is the wedding be priority because the callback is unlikely to lead to anything.
It's no wonder Roman has self-esteem issues when the people he cares about, from his perspective, didn't believe in him.