Do they though? I get that their goalkeeper had some great saves, but would you consider him one of the best? I wouldn't. Look at their defense, do you really consider any of them as one of the best defenders? They are not top 5 in their position, none of them. They do have a decent midfield, and without Messi that midfield looks like it's just good, not great, not best, just good.
I feel like Argentina doesn't really have a great roster, they do have one of the best team chemistries in the world right now and with world cup that went up even more, they are literally a family at this point but I do not think that they are more talented than others. In any case, Messi will be there, and when you have Messi, you may end up getting a win anyway.
Well. Argentina do have the most valuable player (Lionel Messi) right now. And now coming to other players, I agree that they don't get included if we create a list of top-5 for each position (Emi Martinez IMO is one of the top-5 keepers though). But they work together fantastically as a team. At this point, Argentina has the best team bonding for any of the teams. This is something that is sorely lacking with UEFA teams like France and England. Don't get me started on the fight between Adrien Rabiot on one side and Paul Pogba and Kylian Mbappe on the other, in which some of the family members got involved.