The LLM writing sameness is bad. Use LLMs to help your writing! But don't include a word they generate, even just a vocabulary adjustment, in your own output. Have them critique structure and flow, spot overused words and passive constructions and dumb picks for topic sentences. It's great for that, and those are all objective improvements in your writing that won't mess up your style.

The LLM sameness in web design is good. Most sites shouldn't try to be idiosyncratic. The best design for a site with real utility is legibility, and LLMs are better at that than the median developer. Always laying out the same buttons? Always using the same type scales? Good! If it looks good to you, you weren't going to do better on your own, and you were very likely to do worse.

Absolutely agree. I recently wrote a speech and can't imagine how terribly hack it would have been had I taken the LLM's words as my own. I have second hand embarrassment just thinking about someone writing something important for or about a loved one and using the saccharine crap that was suggested at various points to me. Absolute drivel and a giant flag that you don't actually care enough about the audience to bring your own words.