Docking via \"landing\" could be stupidly exploity.
Just imagine your shooting at someone, just for them to crash into a homebase and become invincible.
For that matter, have you even played this game?
I can understand maybe landing a fighter on a planet, but you can get the same result by making a tiny docking port. Then you get to capitals the size of planets, which according to you, should be able to \"dock\" by crushing the planet...