Yeah but don't forget that Electron is literally packed with features. For example it can draw SVG, it can play video, it can do 3d stuff, do networking stuff ...
Cries in InteliJ (java) and 1GB+ ram usage.
IntelliJ is a lot more than a GUI. There's a ton of language modeling and parsing and lookup stuff going on in there. It has tons and tons of features too.
Electron is hundreds of megabytes for "hello world."