I think he is saying that if the ROCAF fighters lay back, in the air, behind the SAM screen, then they can use that tactic to force the PLAAF to come to them in an environment where the ROCAF had a much better chance of keeping the PLAAF from obtaining air superiority...not in achieving it themselves.
The issue is denial to the PLAAF which will need air superiority in order to effect any crossing of the straits.
Let's all hope and pray we never have to find out.
That would be reasonable but for the fact
1) The strait of taiwan is not that wide and taiwan is not that big, so the airspace over taiwan would be a little crowded since the respective ranges of the PRC and ROC land based SAM batteries means there's an over lap in their respective kill zones along most of the western tawainese sea board (gets worse if the AAW destroyers are factored in) staying behind one SAM "shield" and not straying into the other doesn't leave that much airspace to defend but leaves plenty of air space for the PLAAF to attack the SAM installations and other targets with relative impunity using ARMs and ASMs!
2) The PLAAF will be taking an offensive strategy any way, they aren't going to take back taiwan by sitting behind their SAM shield, so you might as well engage early and hard to blunt their subsequent sorties, every plane they leave to get back for re-armament and re-fueling is another set of bombs and missiles they'll have to deal with.