Social norms and taboos exist because people saw the downsides to performing those actions, even if they didn't understand the underlying causes of the negative results.

This is spot on.

Technology is a big part of the cause, and it's only going to get worse. No matter whether you believe in Christ and Creation or evolution, pretty much from the beginning of our species until the 20th century, average day to day living was pretty hard and dangerous. Societies everywhere created cultures, moral codes, ethics, taboos, mores, and the like in order to safeguard themselves from the negative effects of behaviors that would happen without them.

Even 'muh patriarchy', which arose independently everywhere on earth in nearly the same form, was a response to the natural destructive and anti-civilization tendencies of women. Anywhere where there was a large enough group of people to be called a 'society', the men observed how women act, and how their attempts to manipulate, monkey branch, spread gossip, lack of integrity and honor etc, and decided that the only way to have a society that works is to keep women from having a say in it.

But that applies to thousands of different areas of life. Technology makes life easier, safer, and more comfortable. Devices make it so people no longer have to do a lot of hard manual labor. Men invented machines to plow fields for them, and appliances to do most of the woman's work at home. Even medical technology keeps people alive who otherwise in any other time in history would have died out. The 20th century and beyond is the first time in history where entire civilizations are full of people who would not have survived if technology didn't keep them alive.

Personally I think it's either a plausible answer to the Fermi Paradox, or a sign that Christ's return is actually pretty close this time. For thousands of years, people have had some connection to the rustic rural survival lifestyle. Even in the most opulent cities, rich people still knew how to start a fire by hand. They could look out their window and see the farmers farming. They understood that drinking water came from the well or the stream or the aqueduct, and where that came from. Thousands of years, and even kings were still connected to basic survival living in some way. And that ended in the 20th century. Technology made it so the last thin threads that kept humanity attached to real life as a mammal that had to survive on its own on earth were severed, and now hundreds of millions of people are totally disconnected from the reality of being a living thing that has to work to survive. Technology does all of it for them.

And their understanding of all the social codes and taboos you spoke of, that were meant to be safeguards, is totally absent. It's like humanity was climbing a ladder so tall it stretched past the clouds, and as we climbed, we could at least still see the bottom and the ground and that we were on a ladder. But as the ladder breached the clouds and the latest generation could no longer see the ground, they didn't know it was a ladder anymore, and promptly began sawing off the part underneath them because they didn't know why it was there. The 20th century was the ladder passing through the clouds, and right now I think we are mid-saw. What happens to humanity when the generation who completes sawing off the ladder beneath their feet is finished? I'm not sure, but likely either Christ returns, or if you prefer extinction of humanity as its existed up until this point.