I cant believe Mateo Retegui acept the offer from this league, i mean he is so young he comes from being the top scorer of SerieA, Atalanta makes a good shot and for sure in economic terms for him is also a super good deal, but you are risking your whole career, for me he needs tos tay in europe, the only good thing about this for him is maybe if he maintain his level can come back to europe later with a ton of money in his bag.
I don't know if the transfer is complete, but it's likely close. The financial gain is quite substantial for a young player, and there's no way he could earn that much in any other league. Etegui had the opportunity to play in the Champions League and prove himself in Serie A at Atalanta.
A move to Saudi Arabia will likely put him off the radar of major European clubs, and it's a big decision, so I respect that. I'm fine with the money he'll earn in a short time, but leaving Europe once means the chance of returning is very low. As you said, he's risked his entire career.