They are nowhere near as good as people think they are.
What are you basing that on? They’re comfortably the 2 best players out of the traditional top 6 and I would say they’re better than a lot of players in the top 6 sides too. They literally single handedly carry their sides week on week.
Grealish in particular is a special talent. If Southgate doesn’t pick him then he’s a bigger moron than I already think he is for picking Mings etc over Dunk.