> he'd ignore people carrying a kilo gram of weed
This is an unequivocally reasonable approach. The prohibition of cannabis is a grotesque charade.
A kilo of weed is clearly a dealer, and part of organised crime. The same people are deeply involved in forced sex work and people trafficking, extortion, illegal weapons, etc. There is a clear difference between end users and small time dealers and the distributors.
I personally would like the police to come down hard on unauthorised and unregulated chemists. Not a fan of dealers being tax exempt, either, given the negative externalities their services provide.