You can't vehemently say that there will be no possible chance of Alisson moving to the Saudi league even though we know he's important to Liverpool but saying that only an offer from Real Madrid will only persuade him to move out may not really be true because Saudi Arabia teams offers European players mouthwatering amount to come to their league and considering that most players now are after the money they will make in the Saudi league he can agree to go there. However, there are still other world class players in the Saudi league so if they had same reasoning they wouldn't have been there.
Very few if any elite, world class players, in their peak years are playing in Saudi Arabia. And don’t give me 39 year old Ronaldo as an example.
Alisson Becker is not going to Saudi Arabia, it’s that simple.
Funny though, Ronaldo isn't only the world class player in the Saudi league, Karim Benzema, Neymar, Riyad Mahrez, Moussa Dembélé and Sadio Mané are all in the Saudi league remember though Liverpool wouldn't allow Allison to leave anyway because if they do it will cost them so much so I agree with you that he isn't going to Saudi league and since Fabrizio Romano has made a reliable confirmation about Allison not joining the Saudi league, let's just accept it the way it is.