From: czech republic
I was not aware of air superiority issue, but I would almost swear in some scenarios, or rather campaign BOTH sides did bombing runs.
Even if it is so there is air superiority, it may well change.
There may be occasions, there is no superiority ... not 100%, so if you want to be airsrike invincible, you will have to ask for cover and spent points for it, or opt for AA. It's a matter of balancing.
The superiority may appear in more subtle form. Eg. if in scenario in Africa as british you get only Blenheims and no fighters, you may guess fighters are on oponnents side and it may be a waste of points to try sneak the Blenheims in, on the other hand, if you get all it doesn't mean enemy is inferior, he may still have similary massive force. Just another choice ... I LOVE choices