>>53663489....Because they didn't want to?
They created Tink to be a mix of Dwarven smith and "tiny girl wielding a BIG fuckoff weapon" trope, giving her a DGAF attitude and a habit of doing what the fuck she likes as natural behaviours.
At the same point, they created Sqawkabilly and decided they wanted the regional air travel to relate to the region's native creatures. they then decided to make an in-universe explanation as to why Paldeans trained parrots to pull pods, rather than the previously-used bird. You're the autistic cunt who needs game mechanics to be canon to the universe, not them.
A region based off the UK using a pokémon that calls to mind the image of a black london taxi cab as its regional air taxi service is fine. Re-using that same london taxi-looking motherfucker outside Poké UK clearly didn't work for Game Freak. 
