"Solved"? What is "solved" in that scenario? Neurodivergent kids not having to deal with being neurodivergent?
I can point at different approaches to the issue in different places and take notice of different outcomes, but even now, having kids around me who do need support due to specific issues that I won't share here, and having received that support in different ways in different countries... I don't even know what the "solved" status is.
I want them to be happy and get better at the things where getting better is an option, and I want them to be accepted and supported on the things where it's not. There's a reason why those kids are being supported by professionals and not just going with whatever my best guess is, and I'm certainly not assuming that our local answer is either the best or the worst, or even that there is a single, blanket right answer, for that matter.
The ethnocentrism is an issue in general, not just in this issue, but I disagree that it's only a problem if there is a marvellous utopia where the problem is fully resolved. Maybe that assumption is part of the ethnocentrism problem itself, I don't know.
