Likely, few people read it, maybe just one voted, and that’s just one, potentially biased opinion. The score isn’t significant.
I don’t see anything particularly wrong with your post. Its sustaining ideas seems similar to the Fermi paradox, and the berserker hypothesis. From which you derive that a great filter lies ahead of us, right?
Our bodies need to perform different roles as we age and mature. We’d also need different sets of skills depending on our current developmental phase. It would make sense for our brains to change too, that the developmental path of our brain is planned to make it undergo changes that’d make it more adapted to the tasks it’ll have to tackle over different developmental phases.
It’d make sense for our brain to be more fine tuned for grabbing resources from family when we’re a kid, to grow as fast as possible, then better tuned to search for sexual partners once we’re getting mature, and lastly, more fine tuned to take care of our kids once we got them.
And if there’s a mechanism which makes our brain undergo developmental changes along a pre-planned path, then we might also expect that past the age at which we reproduce, there’d be less and less evolutionary pressure to shape that developmental trajectory.
I don’t think either that evolution would have much of a reason to cleanly engineer a stable end-state after which development just entirely stops, and leaves you with a well-adjusted, perfectly functional body or brain. That may not be a trivial task after all.