Got to be honest, players like Lukaku and Drogba have both got physical presence, but their technical ability is still not diminished - their heading and finishing was/is unbelievable, but there aren't many 'black' black players with fast footwork, as you see with the likes of Neymar, Mata, Hazard, Messi, Ronaldo, Ben Arfa etc...
I think in general, many black footballers have the physical attributes other races don't have as much. When your physical is good enough, you can run and muscle past a player rather than "skill" your way past him, you tend not to be as good in the skill part if you've done it less often.
Players become technical when they have to adapt their game to stay in the team as their physical side isn't good enough. Then again, you can get some outstanding players who have it all, e.g Ronaldo (both of them)