Dr John Campbell- Doctor of Philosophy, not medicine.
If you take a look at this study, there are some serious criticisms of it.
I never believed masks were perfect but I wore them during the pandemic anyway. If they help - even a little, then whats the problem with wearing them? At the very least, if they are wearing one, it should prevent someone spitting all over you as they talk.
My experience with people that dont like masks is that its more about the fact they dont like being told what to do, not about science.
https://www.health.com/cochrane-review-do-masks-work-7112631