I think your question would have been better as its own thread, but regardless, to answer your question:
I don't know what's possible or
what's not possible. Because I don't know, I regard stream-entry as a possibility. It is entirely conceivable that one or more of us may already be some way down from the seven-to-go and we just haven't realized it yet.
Gil Fronsdal recorded a talk a while back in which he challenged the listener to figure out what their "ultimate goal" is. My answer to that challenge is to 'find out where this path goes'. I don't know how long the path is and I don't know where it will end for me. What I do know is that I'm drawn to it, it "feels" right, and I'm a better person for it.
As for the suttas, et al, there most definitely is
knowledge buried in them...perhaps even the secrets of the universe! However, between my work, my workouts, my practice, my family, etc, etc, etc, I don't have time to read/study/understand them the way some here are able to do. But, I do read some everyday, and I'm not just ticking off the pages either. I'm constantly looking for that less obvious meaning or that one phrase that will really tee something special up in my practice. Are they the gospel word of the Buddha? I doubt it. But I do believe his wisdom and teachings are contained in them.