its not about jaggies, without taa, rdr 2 does not function
i don't know about you but i can't stand rdr 2 without TAA. everywhere shimmers, foliage is not rendered completely, everything looks half baked, most of the stuff looks like they're pixelated and stuff
game literally breaks down entirely without TAA. it literally needs a heavy TAA pass to reconstruct tons of stuff / denoise lots of stuff
some games depend so much on TAA that they don't even give the player to option to turn it off (cyberpunk for example). rockstar is just being nice but in the same time its just a worthless gesture, being able to turn off TAA does not mean you should. if you enjoy TAA-less cyberpunk and rdr 2, all the power to you. wish I were like you but TAA is a hard compromise these devs started to make for their games to look "okayish" with tons of half rendered stuff
i dont care about technicalities behind it, i just know that its mandatory for this game
if it were only jaggies, i'd gladly shut off TAA. as a matter of fact, i shut of soft TAA applications in such old engine based games. but new games that are completely designed with TAA in mind literlaly breaks apart without it