Why are there so many stallfags on pretty much any competitive scene of Pokemon?

You see so many people using teams consisting of nothing but stallmons. There's no strategy put into the game. None. Everyone just leeches off whoever comes up with a new stall team by simply copying it.

Instead of banning stall you have groups like Smogon being incompetent and banning things that outright disrupt stalling and turn a blind eye to major offenders. I can assure you Nekkoala will be banned when it comes out because its ability shits on stallmons.

So what do we do? Do you think people will eventually let anti-stall moves/abilities/etc. run or are they going to keep banning that shit?