the Arsenal we currently see is much different. Arsenal's only ambition this time is to win the championship title which they have always failed to get due to Man City's dominance. So there is no reason for Arsenal to let go of one of their important players. I say this player is important because Arsenal, since last season, has always needed second-string players who are of the same quality as the main players. Because in the 2023 season we will see Arsenal fail due to a lack of quality second-string players. But in 2024 they have a second layer of players who are getting better. And as a result, they even almost won the title with a slight difference from Man City.
Al-ittihad will definitely be targeting other players at this time. and hopefully it works.
While I do agree that Trossard might be a good rotation player for their premier league title hopes, getting some good money for him could have meant that they could get some other player there instead, the problem is not the offer, it's the timing.
The transfer window is closed now, which means that we are seeing premier league teams not willing to sell players they would have to replace, sure you can get players they do not want in their squad, but Trossard would have to be replaced and they can't replace him. If this offer was done a month ago, I bet that Arsenal would have accepted it, take the money and get some other player there instead.
Saudi league having a bit later transfer window allows them to get unwanted players for cheaper when all other teams fail, but at the same time it means that players who are wanted will never leave because they won't be able to get replaced. They can go knock on Chelsea's door, Chelsea has so many players they do not want on their team.