You've got absolutely zero proof Sane isn't committed to the team while he is here, absolutely fuck all. David Silva wants to continue his career elsewhere, just like Sane, the reasons are irrelevant, it doesn't mean he isn't committed to the team, just like it doesn't mean Sane isn't committed to the team.
You're guessing, you're speculating and you're making presumptions on something you can't have any concrete justification for, and you think you're right, don't make me laugh. You'd have more credibility judging Sane on a lie detector test on Jeremy Kyle.