To be honest, it seems like we mostly agree, so I don't see what the issue is. >The initial response above seems to indicate that a person shouldn't speak on s

To be honest, it seems like we mostly agree, so I don't see what the issue is. >The initial response above seems to indicate that a person shouldn't speak on something outside their primary career. Already addressed this in the very comment above that you replied to. This is incorrect. Regarding where the "bar" is exactly, that is of course subjective. But I reject any idea that its subjectivity implies that all opinions are valid or whatever it is you're suggesting, because they're not. Some opinions are uninformed, and I have no problem saying so.