your approach is highly important about Bitcoin adopting POS for more scaling but the issue here is how to convince what you have described Bitcoin fanatics or maximalists to change their mind and become more flexible towards the development of bitcoin.
I wish you the best of luck in your endeavours, but maximalism has nothing to do with it. It's more like empiricism. We see on a daily basis what works and what doesn't. And what definitely doesn't work is the people who believe they can just turn up here out the blue and announce what would be "better" and assume that everyone will just go along with it. We're gonna need a little more than that to get over our well-founded skepticism of your "novel idea" that's been proposed and rebuked more times than I care to count. Why should I be flexible when it comes to inviting terrible ideas that would weaken the protocol? That's kind of a red line for me.