One of the workshops I run is business writing for professionals. It’s hard to avoid getting a bit English-101 so we do dabble in some common errors of grammar, syntax & misused or confused words. (Are you disinterested in this topic? I suspect you mean uninterested but hopefully not that either).
I raise a few ‘rules’ of English & the inevitable myriad of exceptions. It’s not for academics or novelists. It’s for practical business communicators concerned with impact, risk & reputation – all of which can be effected (I think you mean affected) by our writing. So, I get the groups to generate their own rules / guidelines / principles for the real world. I’ve done this dozens of times & the results are always similar.
Reading efficiency, consistency, the writer should do the heavy-lifting for the reader, reader centricity, ambiguity is the enemy (97% fat-free & gluten free, anyone?) & my favourite: if in doubt, leave it out. Whom would have a problem with that?
How does your writing measure up?