I mean writing systems are not a part of the real spoken language and how it evolved. I think it’s fine to be prescriptivist about writing systems as many did not evolve naturally anyway, and many could be made far easier to learn and use. You shouldn’t mess with spoken language as that’s the part that did evolve naturally and is still subject to evolution. The focus though should always be on making these writing systems simpler and a better reflection of the spoken language. Hangul is a great example of prescriptivism over writing systems.