e.g., starfield would've been a very different game had you been able to fly space -> surface, and had there been vehicles to do actual exploring with
it would've completely changed the way the game plays, and opened up new possibilities for design. it also would've removed many of the oft-criticized loading screens and made the whole experience flow better.
but they can't do any of that, because the engine isn't good enough to support it.
sometimes you can't make a choice because the engine says no
I blame Emil Pagliarulo first and foremost. "Design docs? HAHA, that's for losers!" He's also the lead writer and no doubt the asshole behind space magic in the game, since he couldn't put radiation witches in FO4.