Like Siebter said, and due to the inability to have read my post in the same detail I have read yours, I will not oblige to your straw man, as it is a fallacy. There are many articles I've linked here and the only information I've discussed is present in them. If I tell you god is real, that I know it for sure, you will ask me for proof. If you say god is not real, and that you know it for sure, then I will ask you for proof. Both are completely useless reasonings. They have no value whatsoever, no predictive capabilities. I will however present some further thoughts on things that may actually be relevant to other readers.
Also, generalization is another fallacy, and I'm sure many people here got their medical marijuana prescriptions from doctors, so all doctors are not the same. In most countries, lacking a similar political agenda, cannabis is not legal, but medicine made from its active compounds is. There is a reason for this, and that is safety concerns.
The reason most doctors don't prescribe marijuana is the same, safety concerns. It's hard for a good professional to prescribe something without knowing what it may cause. This is also why most doctors don't prescribe you teas, even though some have medicinal properties. Medicine is a specific field and pharmaceutical companies extract the active compounds from plants/animals/whatever in order to better be able to study and later replicate results.
I do not believe cannabis should be sold as it is, because it tricks people into thinking it's harmless. I believe it should be decriminalized, as it is in many countries and legal for medicinal use. I believe free sale would need far more strict guidelines, not that it doesn't have some, but still. Whoever wants to get it for other uses, should need to put enough effort to reason about whether it's a worthwhile experience or not, keeping in mind that there are risks involved.
Your biochemistry proof is non existant. If you took the time to learn it, which apparently you haven't, you'll not find a 'endocannabinoid deficiency' condition. You will also not find a THC 'pathways' because substances introduced into your bloodstream, don't follow a predictable direct path. You will also realize toxicity is a measure associated with dosage. When consuming cannabis, you introduce a whole load of compounds into your bloodstream, respiratory tract cells and who knows where else. Some may be harmless, some may not. Most of them, we probably don't know yet.
We do not know terpenes and cannabinoids role, and we barely scratched the surface of the main ones involved, particularly the cannabinoids THC and CBD. We also do not produce THC or CBD in our body. They are produced by plants from a single precursor, cannabigerolic acid(or C19 analog), from reactions whose kind of understanding has been relevant in both finding the different cannabinoids that are produced, and also synthetizing new ones. It's also important to remember that these compounds, when introduced to the human body are metabolized into different things, the main route for which we know happens in the liver, where a cytochrome catalyzes it's reduction to 11-OH-THC and THCCOOH, two far less studied compounds that also end up in your bloodstream. The fact some cannabinoids in their decarboxylated form are agonists for certain receptors(CB1 and CB2) is sheer luck made possible by a partial similar chemical structure to other unrelated molecules like anandamide. While we can say specific things about such interactions, we cannot pretend to say that's all that's happening, it'd be presumptuous to do so.
All in all, you believe whatever you want. I consume cannabis, purely recreatively. I understand there is a risk and I know it's harmful in many ways. I know people who have been prescribed cannabinoids for medical purposes. I know people who say they consume marijuana for medical reasons, but they have never been prescribed it. I know people who are convinced cannabis treats their problems, but there is no evidence whatsoever of that. The sheer amount of people falling for placebos in the subject related studies is quite interesting.
To shame, or misrepresent doctors for making smart data based decisions, should not be acceptable.