Ah yes, the tongue-in-cheek excuse. Coupled with predictions of Velo d'ors because of the double double and Lombardia and what not...no, the posts on this forum in the Remco thread have been clear for ages, he was expected to be the new Eddy Merckx. And still is expected to be the best rider. Unbeatable in false flats (that's where he attacked in Zürich btw) getting back everybody as soon as it's flat, whatever. If you expected Remco to win the Giro 2020 (and lots here did) and the Giro 21 in his first race back (and again, lots did) and all the other stuff he was supposed to win plus the impressive stuff he has actually won... then saying no no, it's tongue in cheek is just ridiculous.
As for the GOAT? We're witnessing history, why isn't that enough? Why do we have to delete history then? Eddy who rode against farmers and would be beaten today. Cycling was less global. Less specialized. Of course he would be beaten. But would Pogacar win in the 60es and 70es? Without all the data. Without radios. Without the team that works for him. There always were stronger and weaker teams, but was the talent so concentrated in so few teams back in Merckx era? (Don't know, but suppose not) Nobody knows what would happen if we transported him back there, nobody should really care.
Merckx is the GOAT, Pogacar is writing history and it's a real possibility that he will be regarded as the GOAT once his career is over. Something nobody thought possible for any rider even 5 years ago (ehm, ok, the Remco crowd...) Merckx says he's above him? Recency bias, senility setting in maybe. And doesn't mean he means it over the whole career, could as well just mean what he has been showing us since 2020 is a higher level than Merckx had. Now it's about longevity. And of course he doesn't have to match the palmares exactly, cycling indeed is different now, plus the value of races change. The Flèche in the 60es was more highly regarded than nowadays, worth more (and used to be more important than Liège-Bastogne-Liège as well, not sure when that changed exactly) On the other hand Merckx Amstel win is pretty much worthless. But he couldn't win Strade Bianche. Etc etc. To really be the GOAT he needs to win a bit more. (If he retires today, had enough of cycling, in 5 years Merckx won't call him the GOAT, but lament the lack of commitment Pogacar had. ) Another Tour, another Giro, a Vuelta could already be enough, if he goes on a classics spree.
But actually for the moment I don't really care if he's the GOAT or will one day be, I'm just happy to witness this live. And really just want to see Pogacar winning Roubaix, much more important than being or not being the GOAT. Go for Roubaix 25!