No but that's not what I'm getting at.
If Germany never won the last world cup would people then say "nah, Neuer was a great keeper but I wouldn't put him in the GOAT discussion. He never done it with Germany!". I'd doubt it.
Club football is the pinnacle now and Messi has shone like no other. Whether he won with Argentina or not it shouldn't change the fact that he's a phenomenal player, and, IMO, the greatest ever.
You know the international football argument is silly when you can point out guys like Luca Toni and Kleberson are World Cup winners and Messi, Ronaldo, Cruyff, Maldini, Platini, Best, Di Stefano, Eusebio and Puskas aren't. And in the case of Messi and Ronaldo, they've been unbelievably great in the toughest club era ever. That counts for more, IMO, than beating the likes of Venezuela and Ecuador or Iceland and Albania.
The international football argument isn't to compare Luca Toni and Messi
its to compare the GOATs.. Messi with Diego, with Pelé etc. its the way it is