I never said he isn't good enough for that, but that club has to want him and then be able to afford him. He would probably want to earn more than what he does at Wolverhampton, understandably, and teams competing in Europa League normally don't pay wages like Bayern, PSG, United, City and Real Madrid.
Oscar didn't come back, but Carrasco did. It's not like he doesn't have the choice to come back, and even if he doesn't, so what? If he and his family are happy and enjoying life, why do you care so much about that? You'd probably do the exact same.