If you look at it on a longer timescale, maybe the 'blip' was the rise of patriarchal, hierarchical social structures which needed a lot of labour/fighters following the invention of agriculture.
Yeah, I'm not convinced there is much strong evidence for this reading of history. It's a bit of a romantic invention IMO.
Respect and dignity are not dependent on technology. Black men and women in the Antebellum South were physically and intellectually a match for their white counterparts but were treated as chattel, and technology didn't end this, changes in law did.
Certainly, but I am very much thinking in terms of women specifically. Women's lives overall have had a very different curve than mens, almost entirely due to the demands of childbearing and nursing. Exceptions often were women who did not marry and have children.
There is a strain of feminism that has tended to say that freedom for women is only possible under certain technological conditions, and is very focused on making women more like men - so for example you have some feminist businesswoman who argues breastfeeding is bad for women because it ties women down to children and keeps them from working as much as men. Some of these people get very into the transhumanist approach too.
I tend to think we need to look at social structures that can accommodate that kind of difference while still being materially stable and recognised as important and worthwhile. Which, to a large extent, can look a lot like like a fairly traditional extended family structure.
Capitalism however prefers what we have now, and that's a real barrier, and I'm sorry to say that feminism has sometimes been an enabler for increasing the reach of capitalism.
Now, I personally disagree with this on a pretty deep level, but I also am willing to accept that in many instances, a culture that respects men and women equally may have a social structure that does not treat them in the same way, or their daily lives etc could look quite different. Their choices may not be identical, there may be trade offs they have to make that aren't the same as the ones men make.