Can adult women wear their flannel pajamas in public and not see anything wrong with that.
It doesn't help matters that their pajamas resembles the scrubs of some nurses and doctors, even though the material may be different. Those medical professionals generally have no qualms wearing those scrubs outside a hospital environment.
I saw three women wearing pajamas today at a certain county park; presumably they were camping there, but that does not justify their choice of attire.
I have not seen Uhmerican males wearing their pjs in public - maybe one. I suppose there are still some boundaries that they won't cross... yet.