@Count:
Of course. But to be fair, even though humans can definitely be stronger than every other race, the series still loves to hype up the power of other species and whatnot. Even Sea Kings to this day when the first chapter had them one-shotted lol (not that there aren't different types like in the Calm Belts and Fishman Island).
It's rather unclear as of now. But given how the story is becoming more focused on Giants with Big Mom, Kaido, and Elbaf on the horizon, these bounties can certainly become more relevant and elaborated on.
I should have worded that differently. I meant a human can be stronger than members of another race but the entire human race cant be stronger than the others if we take what each race is capable of doing at an average. Stronger in this context refers to physical strength alone.