I don't know, I think you have a point that aesthetic preferences are subjective and shifting. But there is also all-caps monospaced text with emdashes in it on the site; just an example of something I think would not turn into a fashion at any point because it just looks silly (subjectively, to me at least). Thus I don't think the antipathy of people towards these llm-generated landing pages is entirely based on associating it with other LLM sites, there is at least an element of it clearly not being through as much human review and interaction as a hand-crafted landing page necessarily would be.