Disclaimer: this is a considered
opinion. I offer it for what value is evident to you. This is not authority, and I am not the boss of you.
So the medical student take on MJ is that it causes 1) eye irritation; 2) is
mentally addicting (far less
physiological addiction than smoking); 3) when taken for long periods causes "demotivational syndrome".
All that bravery and fun you were having while hi? It gets used up. The feelings are driven by dopamine (and others) distributed with exquisite precision within your head. When your body says: *enough! take out the dopamine receptors!* (and it will/does), then comes the
space cadet; and yes there
is a causal relationship. Thus the popular stereotype of "burnt-out hippie" isn't far off. There is no clinically demonstrated medical benefit in spite of popular acclaim; you pretty much just get yourself good and "
mellow". Mellow enough to not care as much about pain, and mellow enough to compromise your judgment when the dealer comes around with harder stuff.
"Yea, ok. That sounds great! Give me some of that.": *look, mom, now I'm smoking ice!*
The upshot of it is: if you want to start orbiting death, early on -- start weed; you're judgment will cloud (further), and you'll take more drugs -- further burning off the good feelings and remaining judgment. BUT you won't die immediately, and the ride may even be fun for a while. It
will shorten your overall life and quality-of-life, however --
be sure. The end will be much worse than the beginning is better. As well, which may not matter to you if you are already engaged in this life -- it will bring misery on anyone who loves you;
either because of resistance and shame
or because they'll follow you and burnout/die too.
So, should it be legal? No; not unless we encarcerate all participants. That's one strategy a body uses when it fights certain infections, or cancers. Wall it off, let it die of its own excess, clean up the remains, rebuild in the void left behind.
The other strategy a body uses is antibodies -- which cause attack by chemical pattern recognition. Kin to traffic cops who only give speeding tickets using radar guns. Or drug cops who only take down drug dealers using undercover operators. That's more the strategy of keeping it illegal.