Yes, but you need a style before :) But in TFA's author case, he actually had a few other blog posts which feel not LLM generated to use as an example, I agree.
But for plenty of applications it doesn't need to be your personal style. It only needs to be your personal style if you want to present it as your own writing. Otherwise it just matters that it's well written. A catalogue of styles would work well for lots of uses.
I mean, there are lots of people here that writes well enough that giving it some style samples and tell it to adapt the text to "this style: [insert post]" wouldn't be the worst idea.