Just as modo has a different UI than max
Just as Cinema 4D has a different UI than Maya
I don’t see anyone complaining about these other apps who dare go against the standard
All of those apps actually share a lot more standards than you think, and it’s much easier to go from Maya to C4D or C4D to Modo than any of them to Blender.
The one exception is Zbrush for instance, but this one is so unique in what it does that most people are happy to put up with the strange interface (those tiny little sliders, endless scrolling, and obscure 2 letters abreviations)
Blender interface is as alien as Zbrush to many people, but unlike Zbrush, it’s not really unique in what it does, so people do complain with some reason : why try and do it so differently if it’s not really so much better?
Similarly, nothing Natron does is really unique, so it makes sense to stick to common and proven standards (I don’t know if it had to be SO similar, Fusion is great too and it’s not a carbon copy.), because why even bother otherwise choosing what is still currently an inferior product ? At the very least, what they learn won’t be lost if they switch package later or work in a studio with nuke.
If you want to be different, you have to be better.