According to one guy in the comments the game is supposed to be a shooter. Choices are too interrupting.
Anyway; It's better because in your opinion it's better. You get more joy out of it than New Vegas, blah blah opinion can't be disproved with logic. I might as well find my original argument and save it to notepad.
Fallout started out as an RPG, which involves choices, multiple endings (if it's a good RPG) and replay value.
My issue with FO3 (which btw I love, I just love FO2 and FONV more!) is that it was obviously marketed to get FPSers into the franchise, and they loved the game as much as I did - the problem is that they then want the franchise to satisfy FPS credentials rather than the RPG credentials it ought to have.
People who want FPS games have an exciting new release every couple of months if not more, whereas RPG fans are lucky to get one a year - if people don't like FONV because it's more RPG than FPS (and more RPG than FO3) I'm fine with that, just stop bloody whining about it and go play the latest FPS release instead, there are plenty of them - so hands off our RPGs!.