I have been directly involved in the manufacture of one of the ones listed on the OP’s link.
Even using anti fog coatings, fogging is a persistent problem, especially after sanitizing it once or twice.
I have noticed that a regular mask can make it harder for people to understand but IMO it just exaggerated the effect of someone who speaks with poor diction.
I know what the OP is in reference to, which is more about the Presidents culture war on masks.