They can, if it is prepared for.
Again, it's a standart practice. China isn't the first nation who invented shooting at airfields with ballistic missiles.
How? Shut down major highways to park fully loaded jets there with pilots sitting inside waiting for a conflict when there is none? The civilians are gonna go mad with all the disruptions. PRC doesn't have to move until they get tired and the pilots are baked half to death in the sun. They'll eventually have to reopen highways and when that happens, game on.
Plus, with satellite imaging, their whereabouts are known, the locations for the backup highways are known and missiles can target all of them right where they sit, jets, highways, air bases, runways; nothing is off limits for missiles.
And even if some do get up in the sky, PLAAF's has got way more jets to handle them with.
Judging force of this size by two talking heads?
Take your opponrnts seriously, it pays off.
When this happens to the 2 most important and representative people, yeah, it means something to me. If they found just 1 guy or 2 random small potatoes, I would say that could be a one-off. But both the 2 biggest guys make a mistake that basic? That says a lot.
If you go to a hospital and both the director and the head of cardiac surgery couldn't point out what part is an atrium and what is a ventricle on a picture of the heart, I'd recommend you get transferred but perhaps you'd say that's only 2 guys out of a whole hospital and prefer to give it shot.