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As I pointed out, marijuana is well-established as triggering and promoting schizophrenia and related mental disorders, with those effects concentrated on teens and the genetically susceptible. Moreover, marijuana impairs memory, learning, and mental effort on a nearly categorical and dose-dependent basis.

As for whether alcohol or marijuana are the worse burden, the common experience and judgment of modern, developed nations makes alcohol mostly legal and marijuana mostly illegal. You may disagree with that consensus but it is not reasonably open to dispute.

As I pointed out, marijuana is well-established as triggering and promoting schizophrenia

No, you corrected stated that it is "associated" - cause and effect is NOT "well-established".

Moreover, marijuana impairs memory, learning, and mental effort on a nearly categorical and dose-dependent basis.

Ditto for alcohol.

That the consensus is rationally based is very open to dispute, as I have argued. Proof by majority is the last gasp of a failing argument.