It may or may not work out, but how is it an awful idea for sure?
Igor Rosotorotsky was the second best wrestler on the planet when he was a young man. He should have been at minimum a 2 or 3 time Olympic medalist with many World and European medals. But because of wrestling's unfair ways of selecting athletes to compete and the lack of transferring in his era, he was denied a full career (retired at 26). Now he's just a foot note, a trivia question about someone else's career. I wish transferring was a thing back in the 80s and 90s. I think Igor would have been part of many special moments.
Other sports don't do this. They let people compete from more than one country if they're that good. Why do wrestlers have to sacrifice themselves for seemingly these arbitrarily designed processes (when there is an obvious out). You're only young once and time goes quickly. If you want to have a wrestling career and you can go somewhere where you can qualify, what's the downside exactly? Unless Masoumi is angling to be a politician in Iran after he retires? But you still need to have a good career even for that to happen.
Well Ali Arslan is not a 2 meter tall super heavyweight, I don't know why he transfered. Masoumi can't chop his leg off and make 97 to help Iran. So he's either not on the team or he beats Zare (or whoever else comes up). Either way, a really good wrestler is not contributing (besides other countries not having them).
It's not just about beating Zare. There's more to wrestling than beating one opponent. What if Zare is just a bad match up for him? What if someone else can beats Zare for him in a tournament? Masoumi can never beat Zare again and win an Olympic, it's not that far fetched. Plus he can win silver and bronze medals at all the biggest tournaments even if Zare stops him every time.
He has the option of trying to beat Zare or aging him out. But Zare is only 24. Are you going to wait 10 years for a guy you're only 3 years the junior of. And you won't be getting that time back.
Personally, I'd just be proud that my nation produced a great athlete like that. I'd be mad at the dumb rules that forced his hand to transfer and cheer for them anyways.