People should have a look at the Ganja seizures stats in India. Most Ganja originates in the Andhra-Orissa border, dominated by the Naxalites, grown by forced labour.
A prime source of income for the Maoist crooks.
The economics is just not as simple as getting high on a joint.

One of the major reasons for Ganja still being banned in India is this economics. Various central agencies (led by DRI) have had huge hauls of Ganja in recent years. This has broken the economic spine of Naxalism. Noone wants revolution on an empty stomach.

Just google for Ganja seizures in India. Raids as far as UP/MP often have a connection leading back to the Agency area of Andhra or Koraput district in Odisha. If you think this entire domestic trade isn't benefitting the Maoists, you have surely lost the plot.

So for you urban college folk or twitter warriors, it's just a joint. Just weed.

But in reality, it isn't. It's the way India has been battling (and quite successfully), its greatest internal security threat. The threat of Left Wing Extremism in the East of the country.

The police/paramilitary actions you see in the front are just a part of the overt war. This is the other covert war, economic warfare where you starve your opponent to smoke them out. And Ganja raids are a big part of it.
So think before you dismiss it as just a joint. The end.

https://www.google.com/amp/s/odishatv.in/odisha-news/ganja-worth-rs-80-lakh-seized-from-vegetable-laden-truck-in-bhubaneswar-475376/amp

And even as we talk, my colleagues in DRI Bhubaneswar have seized 550 kilos of Ganja enroute to Bihar from AP today