Very true, legalizing drugs is just a way for the government to get more tax revenue.
This is what happened with alcohol.
Before they created a Federal Income tax amendment, the Supreme Court struck down a federal income tax as unconstitutional. Undaunted, Progressives simply added it to the Constitution. But it was not that easy, there was opposition to it. So the Progressives teamed up with the Evangelicals as the Evangelicals made a deal with the devil. Progressives knew that the Evangelicals were concerned about the carnage of alcoholism during that time, it was truly awful, so they told them that if they would support a Federal Income tax amendment, they would support banning alcohol. But they said first, we must get the revenue continuing into the federal government since much of that revenue came from taxes on alcohol. So the Evangelicals agreed as they first passed the Federal Income tax amendment, and then Prohibition. But the Progressives were not serious about Prohibition, as lawmakers would have bootleggers come to the Capital itself to sell them alcohol. Sure, they did a few busts to make it look like they were trying, but they had no intention of it working. So after a few years, the Progressives threw up their hands and said, Prohibition has failed!!
They then repealed Prohibition, like they wanted to all along, and resumed the government being funded by taxes on alcohol. Not only that, the state began their own liquor stores to sell it directly to the populace.
Progressives essentially doubled their taxes with both sources of revenue of taxes on alcohol and the federal income tax, which was the plan all along.
And today, alcohol kills more people than any other drug. It's not even close.
That is the power of legalizing a drug. It lowers the guard of the populace as they assume it is legal, so it must be safe.
Problem is, they assume the government it not there to rob and murder them.