Hah, when someone says, "I am NOT learning Java" and I feel a kindred spirit I think to myself, how painful it is to read Obj-C to this day after years of "reading" it.
Knowledge definitely helps! And I know you're a code wizard, that's why I made sure to "respectfully disagree". I think the response was so terse, it might have left those who read it with a "this is what you need to master first" taste. Your follow up helps me understand your point more thoroughly. It's a common theme I hear from native devs that everyone must know what they know in order to be proficient.
I'm happy to see you say a very good app can be made without Java/Obj-c, and perhaps that's what the spirit of this post is about. A hope to embrace Ruby paradigms over native. I think that's what hope of Flow is, right? Probably most RubyMotion developers, too.
So in the spirit of the post, I guess I just feel we needed that extra information (and more about Android, still). I'm used to being on the side of inquiring, and needing contributors to help describe their vision. I'm glad you did here
Either way you will have to if you want to make quality app. And probably more with react-native than with Rubymotion.
^ Though I still respectfully disagree with that statement. My native framework knowledge is rarely used as of lately in anything RN.