True, but in real life you still got your kills credited (and lauded) even if you belly landed. Kills were for the pilot, not the plane.
In AH's system I'm perfectly fine with a "safe landing" being allowed for belly landing, because you can ONLY get it on the cement. If you belly land anywhere, you get a ditch, when historically you'd still be considered safe and still get praise for your kills. This game makes getting praise a bit harder than real life (because you get more than one life) so I like the "anything is safe as long as it's on cement" rule.
The ratio of random land/water to cement that you can land on is still 10 Million to 1. Keep that in mind.