>bulk up on talonflame

Why are people doing this? Talonflame's defenses are nonexistent, not to mention people will only use eletric/water/rock moves on it and that dumbass bulk up, which is hilariously stupid to try considering you're left open, will amount to nothing. Why not just SD like a sane person and get as much power as possible as fast as possible? Putting bulk on talonflame makes no sense, roost or otherwise.