Yes, it's a category of materials that is overwhelmingly populated by a much more specific, ultra-cheap and therefore ultra-pervasive, set of chemicals which are shown in study after study to have worrying characteristics.
Anything that shows evidence of omnipresence, endocrine disruption, bioaccumulation, and inter-generational transmission should be extremely, extremely closely scrutinized.
To think otherwise is absolute braindead contrarianism, full-stop.
Personally, I think that the Microplastics Moral Panic is a textbook study of F.U.D.
There is practically nothing that ordinary people can do for prevention, mitigation, diagnosis or treatment of microplastics in our bodies, so I therefore conclude that it is futile and wasteful to worry or argue about it, unless you have abundant free time and resources to get paranoid strangers all in a frenzy, for no good reason.