You're mostly right, but that means you're missing an extremely important piece of the picture.
Both the browser and Node provide hardly any structure at all compared to Cocoa, WinForms, or even the Java standard library. Experienced developers recoil because it feels like building a house with hand tools, compared to having a team of contractors at your disposal.
This results in JavaScript developers building their own tools. That's why there are so many of them. In iOS no one writes a GUI toolkit, because Apple already provided one and it's pretty good. People have their complaints but they're rarely serious enough to warrant throwing the whole stack away.
In that sense these more robust platforms are superior. But the JavaScript world is like a giant evolutionary system trying all ideas at once, at almost every level of the stack. Lots of repetition, lots of death, but also WAY more ideas floating around.
JavaScript frameworks all look the same to outsiders because they mostly are. But they are different in subtle ways that you simply can't explore on iOS because Apple already decided where the major architectural boundaries will be.
There are painful tradeoffs on the JavaScript side, but I think in the long run the fundamental advantages will become enormous. I believe the web a disruptive (to native) technology in the Innovators Dilemma sense, but we're still very early on the adoption curve. Only a fraction of a percent of people use the web's most powerful feature, which is JavaScript functions.