I, for one, never bought into the tax it argument. That is more for statists like you who need to feed the beast and fund other Wars on Whatever.
You’re talking about feeding a welfare system from druggies that will be FAR more than enforcement losses.
Whether you bought into or not is not the issue. CA Prop 19 and other pro-dope measures are on the table in part TO ADD TAXABLE REVENUE TO THE STATE.
Just like cigarettes and booze - the gubmnint will tax the hell outta dope.