I agree with this, I mean he could be a good player but nobody will offer him that much money in any of the big clubs, it would be impossible, not difficult but literally impossible. On the other hand if you get an offer of 40 million dollars from PSG but 350 million dollars from Saudi league, isn't it basically obvious why would anyone prefer that? I am not saying he would, but if he ever did, I would totally understand why.
Plus, Ronaldo got all the heat from being the first superstar to come to this league, and Messi following up will be easier, every thing that could be said about the situation has been said, Messi would get less comments about it for sure.
What could be Messi's possible reason for continuing with Paris Saint-Germain, despite the lower salary? One factor is that, in case he want to represent Argentina in the next world cup, he needs to participate in one of the top leagues. And here we need to admit that at this point, Saudi Professional League is noway near the Ligue 1 in terms of quality. But how important is this factor for Messi? Does he want to get in to the national team that desperately? I don't think so. He has already won the world cup for Argentina and may not be interested in playing for them again in 2026.
I think even if he wants to play, dude could retire today, and not play for another 3 years or so, and then he could still be called for the national team. He is seen as legendary as Maradona right now, and I think he would be respected too much to not be called if he wants to play, like I said he could play zero games for 3 years in a row and still could be in the team if he wants to, nobody will have the courage to keep him away from the team.
So, if he wants to stay with PSG he could do that, if he wants to leave for Saudi league for the money then he can do that as well, nobody would mind him playing anywhere as long as he is still playing for the national team.