I would say that Halo takes a lot of skill. Precise aiming, jumping, knowing how to toss grenades, what weapons to use in certain situations, etc. However, Smash has something that is impossible for Halo to have because of the type of game Halo is, and that my friends, is mindgames, which is an integral part of competitive Smash. Also, V3X is trolling, so leave him be.
I go to a college of 10,000, so I have no idea who plays, and who doesn't, but I do see signs for Halo and Gears of War tournaments, and never any Smash, so I guess it can't have too big of a following.