Probably because NFEs aren't viable in higher tiers? Smogon users don't pretend NFEs don't exist, they just don't use them in OU except for shit like chansey and i guess sometimes doublade.
What a shithole argument. Do OU players pretend that unown doesn't exist? no, they just don't use shit pokemon. What the fuck were you thinking writing that?
if you think they don't use nfes check the lower tiers where you'll see rhydon, gligar, pawniard and clefairy