I think we are trying to solve impossible scenarios and it simply is not productive.

Alignment will be impossible under current paradigms. It is based on a premise that is a paradox itself. Furthermore, even if it were possible, there will be a hostile AI built on purpose because humanity is foolish enough to do it. Think military applications. I've written in detail about the paradox here - https://dakara.substack.com/p/ai-singularity-the-hubris-trap

Stopping AI is also impossible. Nobody is going to agree to give up when somebody else out there will take the risk for potential advantage.

So what options are left? Well this is quite the dilemma, but I would suggest it has to begin with some portion of research starting from the premise the above are not going to be resolvable. Potentially more research into narrow AI and AI paradigms that are more predictable. However, at some point if you can build nearly AGI effective capabilities on top of a set of more narrow models, can it defend itself against an adversarial hostile AGI that will be built or result of accident of someone else.