This is useful for countries where the Steam Deck is unavailable but other handhelds aren't. Here in Australia, Steam Decks are only available as grey imports, and that makes warranty issues a potential headache, but you can walk into most electronic retailers and buy a ROG Ally off the shelf.
That said, I personally wouldn't buy a handheld that didn't have touchpads, so I bought a grey import and have had no issues.
We've had an R18+ rating for video games since 2013, so not sure why Hotline Miami 2 wouldn't have been able to receive classification.
Funnily enough, I own the game on Steam, so at some point Valve also made the same mistake. But at least they won't pull the game from my library.