its just good micro.
Americans have a Jeep
Wher have a Motorbike (even cheaper than the jeep)
PE have the Kettenkrad (which can cloak block if luft lol, "OMG i ran into an invisible wall!")
Brits have the CCT which flank speeds to block.
It's a fun strat. Hell why did they allow you to be able to Wingride in BF1942?? because it was awesome fun and strategically useful. Not all games need explanations as to why such unrealistic things happen, just there for tactics and fun. Theres tonnes of CoH 'realism' mods if you want to check them out, go for those.
You cant wing ride in 1943 so they learnt from their mistake and got rid of it xD