It just fits the characters the hosts played so perfectly lol. Hammond the Hobbit like mediocre British guy, Clarkson the unruly dumb brute, and May the only one with any actual brains or accomplishments outside of TV, even if he was captain slow and always got lost.
A lot of the humour in the show has aged poorly and was clearly targeted at pre-teen and teenage boys, but there are still some really funny parts of it.
Then explain Greg Davies to me you little mountain dweller. Giants live amongst ye, and neither Danes nor Saxons ever truly civilized the land, I'm sure of that.