I suspect you didn't really read this, otherwise that last paragraph should have given you pause.

This was the very first trial completed which observed the efficacy of HCQ as a prophylactic. As mentioned, like all studies there are always shortcomings, but that doesn't mean that the results are wrong, just that the door is still open for further investigation.

With that being said, any physician that is speaking to you as a medical expert is going to base his guidance on the scientific data available. And if you had gone to the website mentioned in the article, you could have checked to see how many completed trials that test HCQ for prophylaxis. The answer is 2, and the other one had ~2300 patients and also ended up with the same result. Any doctor worth his salt would tell you the same thing, because the only studies that exist show no effect.