The effect of a small handful of top riders on blocking GT wins isn't that big. Dominant eras don't last as long as many often anticipate, and the top dogs tend to concentrate at the Tour anyway. It was like 3 months ago Pogacar had the next 5 Tours about sealed.He will be up against Pogacar, Vingegaard and Evenepoel though. So the talent in this “generation” (a bit stretched but the others are not old as well) is just insane.
It's still pretty hard to assess how good he'll become. Pogacar was a year older when he got 3rd, but it was also Pogs first WT year and he won a load of races and 3 stages at that Vuelta already.