I did not do a comprehensive analysis of Piskei halacha, shailos and teshuvos. But the information that I posted above refers to the Rema, Rav Moshe Feinstein, and the Mishna Berura, who were speaking about a Peah Nochris, which as I explained, is a human hair wig, and they do not qualify their statements with “but it has to be obvious that it is a wig”. Ironically, it is from an article that discusses using one’s OWN hair for a wig. I think it’s kind of obvious that that is going to look real.
It is difficult to prove a negative.
Show me a single recognizable posek who allows women to wear green dresses on Tuesdays.
Everybody knows that one can be machmir, to enhance their yiras shomayim, if that is where they are holding. I am just stating that “assur l’chol hadeios” is not true, regarding the wig looking like human hair.
There are wigs that are rather tame, and look very “fake” to Frum Jews who are accustomed to wigs, but non-Jews are flabbergasted when told that what they are seeing is a wig!
At the other end, there are hairstyles that are provocative, whether attached to the head, or attached to a wig.
Provocative is a different issue. And I assume is “assur l’chol hadeios”, but not because of erva.