I f Microsoft Word agrees with all your sentences, perhaps you're not sufficiently good at writing. Or perhaps, by restricting yourself to what your grammar checker thinks is good language, you're holding back your potential, because the right way to express your thoughts is more poetic than you thought. And for all that's good, don't mangle your pretty words, your very own words, by putting them through a language model.
Orthographic errors are supposed to be bad because a non-standard way of stringing together words is harder to understand than a standard one. Fair enough. The same goes for stylistic errors, which are of course also readily pointed out by many kinds of software, nowadays. But what if, and this is just wild speculation, you understand better what you intend to say than a pile of regex and matmuls?
Bad amateur artists, confronted with the subpar quality of their work, will often defend themselves with: "But that's just my style!" Relatedly, there is only a limited number of weirdness points to spend on your unusual writing style before the reader declares you a crank, unless you can convince them you're avant-garde of course. So maybe I'm just a bad writer and salty that I don't understand grammar and style, but what I can say for sure is that I love bad amateur artists, and wish there were more of them. Good or professional artists, even better. I want to read what you wrote.