My work requires me to travel with guides, I have no idea if they are all above average income 'gentlemens' as you say (before you edited it out) so I can't really comment on that. I'm an immigrant myself along with my community so there's that. If you consider that a 'narrow' view not sure what more to say. There's a difference between fluency and native-like fluency that kids obtain. I would love you to post recordings of you speaking and ask the public to see if they can tell if you're a native speaker or not because I genuinely am curious.