Rav Elyashiv z”l and Rav Vozner z”l were the most recent Gedolim in our times, they were “fortunate” to see the current sheitels. They knew all the earlier poskim you mentioned, and they even quote them in their writings. Their final psak was לאיסור גמור ומוחלט בלי שום פשרות.
Now for us to go start debating on the previous sources after we have the final bottom line psak is not only senseless but rather reckless and dangerous. We don’t have the knowledge regarding this sugya as they had and they ruled לאיסור without compromise.
This sugya is not simple at all and the average layman is unfamiliar with so many facts around the words of the שלטי הגיבורים – it’s not rational to take his words at face value. Here’s just one example of many to demonstrate this:
The same מגן אברהם that you quoted that brings the שיטה of the שלטי גבורים HE himself harshly prohibited even unmarried girls (whose hair is not yet consider ערוה) to go out with long loose hair because it’s פריצות!
Does it make any sense that our girls in school are taught at a young age to keep their hair shoulder length and in a pony tail for modesty (to follow the מגן אברהם) Yet when they become an אשת איש ALL boundaries disappear!
It’s just amazing how the most educated people can quote and twist all these sources to support the current immodest looking wigs and completely miss the fact that the wigs in the times of these Poskim looked NOTHING like the wigs of today. It was a heter (which was a heated dispute) on an item that was completely different from today. Even if the wigs than were made out of human hair- they didn’t have the technology of today and they looked like helmets not like silky natural hair.
This is not about assur/mutar regarding the sheitels- this is about a serious breach of tznius that is causing frum men to stumble and causing a tremendous chillul Hashem.
But please go on posting all the sources that supported today’s immodest wigs (even though they never saw them)
Heaven forbid frum women should have to (gasp!) give up their expensive custom “hair” that most likely comes from Indian temples- and Chas vashalom have to consider covering their hair with a scarf or hat (which Rav Elyashiv and many other Gedolim called “glatt” as the tichel was never a dispute among Poskim) Imagine – married women will actually look like they have head coverings on. What a concept.