Though it's worth noting that MDs (and all other kinds of doctors) can be incompetent and/or batshit insane.
For instance, I had the pleasure of viewing a video where a psychiatrist leaned on his MD credential to "debunk" COVID and the efficacy and safety of the vaccine. Even ignoring his personal competency, I wouldn't be surprised if his specialty has the least qualification to speak on the topic of infectious disease of all medical specialties. Here's the video for anyone interested: https://off-guardian.org/2020/12/09/watch-ask-the-experts-co..., the guy I'm talking about is the first speaker (didn't bother with any of the others).
Edit: watching a bit more of that video, many of the other speakers emphasize being "medical doctors" and several use the odd phrase "medical pandemic." I wonder if they're reading from a script?