Why would you want to fast travel through that world though? It's designed the way it is because it wants the player to be immersed into the world. Absorb the vistas, see the actual fully working animal eco systems, have random encounters etc.
When you're riding along then all of a sudden get bushwacked by Lemoyne Raiders or lured into a trap by Murfree folk... is when the world comes alive. Or when you're chilling out and fishing on the river, then see a Hawk swoop down and pluck a salmon from the water. Or hunting deer with your binoculars only to see it being stalked and killed by a cougar.
The level of detail and immersion is unparalled by anything. It just kinda confuses me when people moan about the game being slow paced and encouraging the player to breathe.
Plus there are forms of fast travel. They're just part of the immersion too. You get a train or stage coach. Not a teleporter.
I mean technically RDR2 isn't an RPG. But it pissed over pretty much all RPGs I've played on a console. Sometimes I wake up in camp, have breakfast, have a little chat with people. Then go hunting for an hour or so. Bring back some food for the camp. Then shoot into town, buy some ammo. Get my hair cut. Go into the saloon. Eat lunch. Have some beers. Play some poker. Go back to camp. Have dinner. Drink some more. Go to bed.
I mean if that isn't role playing... what is?