Because it's not "not considered by anyone".
Democrats have been demonstrably decriminalizing and legalizing weed all over the country, and the Democrats in the federal government have been pushing and submitting and trying to make it happen.
It's republicans. They are the ones that continually stonewall a measure the vast majority of their constituents support, and they are the ones that somehow still get elected despite that.
Show me the democrats preventing legalization of weed federally.
Show me the democrats who invite cop associations to talk at their meetings about how dangerous weed is. Show me the democrats who are taking money from cop associations or prison lobbying organizations who very explicitly want to keep weed illegal.
Stop overgeneralizing! It's literally how things are this bad! Blame who is actually at fault!
Is it necessary to recount how this entire split is partially due to racism, anyway?
That's not the same thing as legalization as it's implemented elsewhere in the US.
Many Republicans are just against it out right, and many Democrats are either indifferent or know that promising to legalize it will mobilize a subset of voters who prioritize it above else (or may just not vote at all otherwise, over 30% of Americans don't vote after all).
It'd explain why there's been so many opportunities to reschedule the drug, and why in some states even when they had the numbers to pass legalization, they still don't. Or do so with extra incentives (often the actual sale of it) to come later (vote next cycle!).
Most US problems come down to inability of congress to just figure out basic stuff like regulating weed. Same with the getting rid of the penny, immigration, tariffs/executive power, doing a proper and legal DOGE etc. They mostly just sit on the sidelines of the big ticket items and focus instead on spending money in their own states.
i used to be of the mind that decrim was preferable to legalization but testing is a pretty important part of making sure you're getting the safest products.
a lot of people in favor of decrim are either bad actors or are under the mistaken belief that all their flower is coming from some nice hippies who only use organic fertilizer and good vibes.
the legacy market was pretty much exactly the same as any other black market: full of people who were in it for the money and didn't care what it took to produce the highest yield at the greatest margin.
now we have legacy actors gone "legit" AND opportunists who got into the market post-legalization who still have the same profit motive above all else.