They are not seeing Weed as a performance enhancing drug they are looking at it as a a judgment impairing drug as they wouldn't let a fighter step in the cage drunk. Decisions like taking that extra shot after the bell, holding that choke a little longer, those are decisions that effect the other fighters safety and they want both fighters to have clear heads when those decisions are made.
Its not about pain relief or performance enhancing.
"If you get hit and it hurts hit him back you not knocked out yet."-Joe Doerksen
The Toxic Terrors (FFL)
Demetrious Johnson*Eduardo Dantas*Rafael Silva*Zach Makovsky*Michael Page