Relevant: https://www.lesswrong.com/posts/Kbm6QnJv9dgWsPHQP/schelling-...
Sure it is.
The point of the fallacy is that an argument should stand on its own merit, and has nothing to do with the person making it. Guess what - experts can be wrong too (e.g. hand washing).
https://en.wikipedia.org/wiki/Contemporary_reaction_to_Ignaz...
I was worried it was going to be like the salmonella thing where it turned out washing a chicken* is terrible advice because it spreads it everywhere and so it turns out that every time I wash my hands after handling deliveries, I'm now covering my kitchen with Covid sauce. I'm very happy that's not the case.
* I've never washed a chicken, but I've definitely seen and heard the advice before.