Well, sure. And Starfield follows in the wake of Fallout 4's lackluster RPG experience, offering shallow conversations and the illusion of choice. After Fallout 4, I'm not sure I can get myself to play another game modeled after the same system of "Would you like a quest? [Yes/Yes but sarcastic/One question first then yes/Maybe later]". If the story is railroaded, Starfield and NMS aren't too different then - there's a main quest line, with things to learn and people to meet, and you check off the boxes until it's done.
But as to whether they should be compared, I think it's unavoidable. There's too much overlap, and no other games like it. Games in which you can customize a space ship, explore thousands of planets, make a home base on any planet you want, and are incentivized to explore and find new places and meet new people? NMS, Starfield, Elite Dangerous, maybe Star Citizen. With some similar gameplay elements and a small pool of games, comparison is natural and expected. Nothing wrong with that.