Comment by hahahahhaah

The problem is app-document impedence mismatch. CSS makes stuff easier but for doc-like pages. In addition doc-like pages want some app-like niceness too.

If you need to be an app you usually need a framework to stay sane (evidence: most other native UI kits are frameworks of some sort) and thus React etc. But they want full contol. Thus 2 ways to do a radio etc.