Writers want to push boundaries.
Readers, in particular social-media-addicted squabblesquats, actively dislike, dogpile, smear campaign, gaslight, dox, swat, and inflict all sorts of hells upon people who "force" them to commit the horrific sin of broadening their horizons.
Some of us have very strong messages in our hearts about specific things, and some of those things are hot button and next-to-never talked properly. Some of them will actively scour your text, word by word, and look for some quintuple-indirect reference of one thing to another thing and declare you as an abomination upon humanity because how could you not account for LITERALLY EVERY DETAIL ON THE PLANET.
A lot of disclaimers (and I was extreeemely guilty back when I first joined because when I first joined, I had been attacked from the left and retreating to the right was right out. So I "learned" this damned quick) exist to essentially say "Hey you! I see you! Stop flaming! You'll only make yourself look stupid!" aka a check that says the writer thought of this and has considered the how and why before making their choice, and it nudges people to infer that maybe the writer isn't just being an ass.
.... Turns out I was the stupid one, for no one has attacked me yet. I leave them in place as a reminder of where I came from, and use my current postures to connote where I yet stand.
(Also most writers are readers and some readers are writers, so that delineation isn't as opaque as I let on :P)
