Sorry for the late reply, and you are correct about different engines are better at different genres of games.
Doom2016's engine was used to make Rage, an open-world game, that plays at a solid 60 FPS on the SeriesX. So yes, ID's engines are versatile.
Yes, Starfield is primarily an RPG, but the standard of FPS-Action in an RPG is currently Cyberpunk2077.
And Starfield and Doom Eternal actually have alot in common, besides being FPS. The shooting areas of Eternal are actually quite large with the impressive draw distances... just like Starfield.
So I reject the notion just because there's a few differences between the games, with more similarities, we should happily accept Doom Eternal, a 2020 game, being 120FPS or 60FPS with ray tracing.... but 2023's Starfield is locked at 30FPS without any ray tracing?
At some point somebody said "We're Bethesda, and we're releasing a game, and just like all the other games we've released its going to sell tens of millions of units regardless of whatever, because we're Bethesda & we're releasing a game."