I totally respect your viewpoint here, and there are indeed lots of incredible things to see and do in a lot of those cities. I guess my overwhelming feeling, though, is...
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Sometimes I get the feeling that some people on here think that Disney and Culture (generalizing here, but I think you can understand what I mean) are two distinct things that cannot be intermixed, or a Disney trip can only be ALL DISNEY ALL THE TIME and nothing else; it clearly makes sense to a lot of people, but I've never really seen this in places that discuss the other parks. And I'd say every Disney park, including the ones in the states, operate as part of, and not in opposition to, their localities and regions (Tom Bricker has claimed that Tokyo Disney, for example, is a more accurate view into modern Japan than visiting a shrine or temple, and honestly he's not wrong). But ultimately it comes down to balance. I would certainly never advocate, say, flying halfway across the world, doing the Asian parks, and then leaving, but I think that there's absolutely a way to distribute your time equitably between everything you might want to do. For the last three years, every visit I've made to a Disney park have included days at Disney and days doing something else. My trips are better for it and, as you say, the variety in those places is stunning.
Of course, sometimes there truly are so many things that people want to do that there simply is no room in those cities to fit Disney in, and it's up to you to determine what balance is right for you, and maybe that really does include, say, 2 full weeks in Paris without DLP. But a lot of times when people say things like that, it comes off to me like those people who say "I don't want to go to [insert foreign country here] because I haven't seen all of the US yet." The reality is that the likelihood of seeing "all" of the US in a lifetime is unlikely, no one ACTUALLY wants to see EVERYTHING, and that what is worthwhile is different for every person. And if any opportunity comes to see something new that you care about, are interested in, or is a new and different experience (and I reject the notion that all Disney parks/resorts are basically the same, or that there's a clear pecking order of the parks/resorts that's going to be true for everyone), you should take it.
But anyway, I'm a broken record on this topic, so I'll stop, but at the very least, yes, definitely stop by Disneyland the next time you're in LA!
