I completely get the "but is it realistic" argument but, on the other hand, I like it the way it is because the alternative would be, well, boring.
It's pretty much the reason I cooled off on the modern combat flight sims. Not because there was anything wrong with them realism-wise, but because I was bored off of my skull firing a missile from 50 miles away and hoping that the enemy was too busy to fire his countermeasures in time. By the way, OP, if you want realistic missiles, then we'll need realistic countermeasures too, won't we? Which would seem to nullify the whole thing.
Just my opinion.