No, it really couldn't. If you look at the history of statements by medical professional, the claims made were reasonable advice based on the best facts available. There were improvements as information clarified — for example, people stopped worrying about spread on surfaces after it became clear that this was not happening on an noticeable scale — but the advice was generally reasonable and had plenty of scientific support (e.g. it's not controversial to say masks and ventilation help control a respiratory disease).

The Hydroxychloroquine / Ivermectin sales people picked random pharmaceuticals and started recommending them without any serious theory or evidence supporting that they worked and, far more tellingly, they were clearly uninterested in testing their faith: it was all based on anecdotes and flawed studies and, unlike real scientists, when gaps or contradictory evidence were observed they tried to confabulate explanations which supported the conclusion they already had rather than question it.