the thing is, blissey could wall scarf togekiss really well, and crippled it with thunder wave or toxic.
bullet punch and ice shard could deal massive damage to togekiss and doesnt really scared of flinched since its prio move (especially banded scizor's)
sand team possess huge problem, since tyranitar resist the air slash, could deal huge damage with stone edge/rockslide, and excadrill outspeed it in sand.
choice scarf lock toge kiss move, so its about guessing what will he do and tried to counter it.
also luck is part of the game, just like how people keeps missing/landing his stone edge/hydro pump, its part of the game