I have a number of issues. First of all, he publicized a drug whose effectiveness to treat covid is still to be determined, but it's pretty important for other patients with other illnesses. The hoarding of the drug can be directly attributed to his pimping for it, and that has caused a measurable damage.
Second, the patient shouldn't be making any such decisions on their own. This is why a medical professional looks at your chart before writing prescriptions, check for drug interactions, etc. People with macular degeneration (more common in older folks) probably want to skip this thing, especially if asymptomatic.
But you don't get that info from the snake oil salesman... you get the "well, what do you have to lose?". That's why you don't ask for medical advise from the guy at the deli in HEB. You ask your wife (in your or my case) or a doctor, or somebody with medical training.
This whole thing turned into a political boiling pot where people apparently want it to work or not work coz they want to gotcha the other side, and it's people's health we're talking about here.
Rationally speaking, every time POTUS pimps drug X or treatment Y, we should all collectively roll our eyes and move on.