The "point" is to fly your favorite bombers around the map, enjoying the hum of the engines, avoiding radar, surviving Bomber hunters, hitting your target, and making it home. I used to be enthralled with this when we had great bomber hunters in the game, "even tho I mostly lost". I have a TV near my system and often would go on a long, lone bomber mission watching baseball or hockey while doing it. Often I'd just picture in my head the WW2 aircrew trying to get to target and survive to get home.
And should you drop HQ you cause a problem cause then many enemy have to drop what their doing and fly goons to get it up again.