I could go to any K1 Speed, smoke in the car before and still be in the top 2, even on a track I never drove before. The whole “impairment” applies to someone smoking for the first few times. Imo and I’ve been a daily toker for 35 years. The only pushback is from people who have never done it and have no clue.
At this point in my life I don’t plan it, but if I happen to have smoked and then decided to go ride it wouldn’t stop me. The reality is that once you get into the zone, which weed is really good at achieving, you forget you were high to begin with. ✌️