I wouldn’t expect a British person to go into an American baseball forum for example and present themselves as an authority - I would expect they would be a bit more circumspect. But that’s not the American style I guess.
I judge on the merits, not your nationality. If you know what you're talking about, come on down and talk baseball.
I don't claim to be an authority. I claim to have an informed opinion, which is informed by other experiences than yours is informed by.
We should judge who had the better series of informed opinions by who turned out to have greater predictive power.