A little bit, but it depends on your personal reasons for supporting legalization. You sound like you are more concerned about bodily harm of a substance, hence marijuana is ok because it's less harmful than alcohol (which we have accepted as a baseline "well of course alcohol is legal!", so we can then allow everything "less dangerous than alcohol")
I support drug legalization more from a "personal freedom of adults to make their own choices" POV. I'd even stretch that to include choices that statistically add strain to the medical system, like motorcycle riding or eating too many unhealthy foods. People shouldn't have the right to tell me what I'm allowed to put in my own body, and there also needs to be commerce allowed to service given needs, so defacto legalization of usage is not a great solution but is a start.
But I've been beating that drum for a long time, argued till I was red with many people who disagreed with marijuana legalization, now it's broadly accepted and those same people forgot how strongly they felt. "People should mind their own business" is a slogan I can broadly get behind and it applies to my opinions here.