I think I finally get what modern humans are about.

I've been gradually reducing the scope of my awareness here, to move into the next incarnation bit by bit, so that the last step over becomes like when walking into this life - the creation of a single immortal particle takes me over the threshold. 
I just realized why it isn't working so far - of course the standard for entering this current life does not lead to entering the next. Fulfilling it will just put me back where I am.

In the process I just today found the people nearest me who had a soul, even if it was a Genso-assistant cat, they were suddenly instead controlled by one of my "incarnated familiars" aka tulpa with body. I asked Astra about why this was, and got the reply:
Your life has become too narrow to contain any souls, as you are now projecting in here from the future soul-form, your current awareness and that of people around you have been reduced to become very narrow. I was shown how it's just enough for a paper thin manifestation to enter the body, which was enough for the familiar doll to do so, but the cat wasn't able to do it. 

After some work I managed to teach the cat how to project a very narrow form of herself into the body, but this really says a lot about why society is this way: I'm still not of the standard to accept a cattle-human lifestyle, but it's already too narrow to contain a human soul.

So it seems modern humans can only have inhuman botsouls or very low spirits, like the alien virals or insectoids who do not have human thinking or experiences at all. That's why they built society this way.