So you are complaining that on a startup forum people are trying to solve billion dollar questions?
Besides, billion dollar companies often miss things. Yes, they have the more relevant experts and much better data than we, but they have to content with internal and external politics and have fewer people throwing around ideas. Sometimes the answer is to "why haven't you done X" is simply "nobody with a voice to be heard had that idea". If billion dollar companies were the infallible giants you make them out to be then startups straight up couldn't work.
Besides, billion dollar companies often miss things. Yes, they have the more relevant experts and much better data than we, but they have to content with internal and external politics and have fewer people throwing around ideas. Sometimes the answer is to "why haven't you done X" is simply "nobody with a voice to be heard had that idea". If billion dollar companies were the infallible giants you make them out to be then startups straight up couldn't work.