They say that because of THC content.
My opinion - THC - when smoked - has a medically ignored saturation issue.
Once THC reaches a certain level in your blood stream, you do not get higher.
However, I have read that you can OD if you eat marijuana, which seems logical.
I grew up in south Florida in the 1960s and had access to the best weed in the world.
We had one hit weed in the 1960s - just like they have one hit weed in 2024.
My opinion - if marijuana is outlawed, alcohol should be outlawed, too.
Full Disclosure - I never enjoyed alcohol, drank only because my friends drank, quit in 1985.
If all the alcohol in the world disappeared tomorrow, I would not notice unless someone told me.
Where in south Florida did you grow up?
I was born and raised in Hialeah