Opinionated programming was/is Rails' major contribution to the web world, as far as I'm concerned. By providing a baseline of things you need (directory structure, modules, logic flow, etc.) it made starting a project easy. In fact, it's just a single command.
I think having all of these (ever changing) options is a sign of Javascripts immaturity; it's not bad, it's just growing pains. Hopefully someone will step up with a cookbook of best practices which will be respected and used throughout the community.
We need a DHH.js to rise up and bring us "Rails, for React".