I understand your perspective and the challenge you have in understanding how Islamic law works. I have a degree in it, so I know how deep it can go. It’s not just a list of “Do’s & Dont’s”, in includes many ‘constitutional principles and maxims’ that facilitate changing circumstances and times.

But your idea of needing to change the religion or even the text only makes sense if you believe that it was fundamentally ‘man made’ and therefore limited in scope and range. But if you believe it came from the creator of the heavens and earth, and He told you this was for the foreseeable future, then that means it will always be applicable. And changing that would corrupt what is essentially “perfect”.