I think a bigger mark against him is the history of star youth riders. Those who come in and compete at such a high level when they’re young. Countless times we say wait until they’re older and improve when in their prime but most fade when older as they were in their prime at that young age. He is a different case in that he is already one of the best climber and TT and doesn’t have to improve in areas like other youth riders.
And I don't know whether that's a plus or a negative, i.e. at least with the riders who needed to improve something, they could remain grounded & focused on that. With Pogacar, he just dominates everything.
And IMO he needs Roglic & Bernal. But especially Roglic, i.e. too many Tours like the 2021 edition (i.e. with a 5 minute lead overall) won't do his motivation much good. If that sort of demolition continues, he's going to need to adopt a Michael Schumacher type mindset where domination for the sake of domination becomes his goal (but that of course comes with its own downside, i.e. such sportsmen become unpopular real fast). And something else to consider is the fact past Tour de France "dominators" like Indurain (& yes) Lance had time against them, i.e. their battle for 5 Tour wins at the time was waged partially against opponents... but mostly against their own body clock ticking the years away.
Pogacar has no such concern.