Different 4K resolutions vs different actual resolutions does little to change the point. In both cases one looks better than the other if all else is equal, but in both cases all else wouldn't be equal and so the pros and cons of each weigh against each other. Just because it's the preferred call for RoTR does not make it the better option across the board. 900p is likely a better call than 1080p for Star Wars Battlefront on PS4, and 30fps is probably a better call than 60fps for Forza Horizon 3 on XB1. None of these makes the other options "basically a checklist box" that's pointless to strive for in other games.
What exactly is your argument? In ROTTR native 4K mode is basically a checklist box because the game look & run better in enhanced mode.