I have no idea why the makers of LLM crawlers think it's a good idea to ignore bot rules. The rules are there for a reason and the reasons are often more complex than "well, we just don't want you to do that". They're usually more like "why would you even do that?"

Ultimately you have to trust what the site owners say. The reason why, say, your favourite search engine returns the relevant Wikipedia pages and not bazillion random old page revisions from ages ago is that Wikipedia said "please crawl the most recent versions using canonical page names, and do not follow the links to the technical pages (including history)". Again: Why would anyone index those?