You say exactly what I think and also I had the same situation - I didn't want to use cocos2d-x because of these awkward editors: cocos studio2, cocos creator.. etc.
Now, I've ideal and simple open source editor that I can change to fits my needs. Thats cool.
Someone may say that editor for cross-platform game engine should be available at least for windows too.
But anyway you need Mac to deploy games for iOS. Mac is ideal platform for development. Almost all cocos2d-x developers creating their games under Mac in Xcode. After game done say by 95% - it's time to compile it for android and again it's so easy on Mac.
However, rewriting SBX using Qt looks like a nice compromise. I wish cocos2d-x team started such open source development.. But I do not think that this will happen..
p.s. I've never used real Mac product(Mac Mini, iMac etc.) for development. Nowadays, it's really easy to install hackintosh using most popular PC hardware parts(tonymacx86) and get cheap and powerful macOS.