Not every anti air must have head invul to function as one. There are many cases in the game, Jin's 2A can be used to low profile some air attacks, many 5B/5C have good speed/hitboxes to work as great air unblockables, 5A's, specially Hazama's, are often good when it comes to countering IAD and cross-up attacks.
They all may be specific, but so 22C is.
And since 22C requires special conditions for activation, its use is very limited outside combos and gimmicky situations (like the one shown in the video).