No, i'm sorry. That's such a loose interpretation of what the genre is that it applies to literally EVERY GAME EVER MADE.
By that logic, Super Mario is a RPG; Forza Horizon is a RPG; and even Space Invaders or FIFA are RPGs.
It's such a reductionist and disingenuous take on what is meant by the term "RPG" that it's impossible to take it seriously as a reasonable or well-considered line of argument.
The problem is Voice Acting. New Vegas didn't have voice acting for the player character. With how many lines the player character has right now, imagine if they had the choice of older (see; better) RPG's. Look at Morrowind. Have you seen how much choice the player has in that game where it comes to dialogue? Imagine if the player had to voice all of that. It's not feasible.
That's why RPG's without Voice Acting are better in every single possible way because they give the developers more choice. If you write a script and someone voices it, you can't change it half way through.
Voice Acting is the bane of all RPG's.
This is not a popular opinion and this is why modern RPG's are so shit. This is why this game is no longer considered an RPG.
Anything is feasible with enough time, voice actors, writers and money. You could easily have voice acting for every line of dialogue and narration in Planescape: Torment, Baldur's Gate 2, Morrowind etc.
The problem is one of simple resources, not technical ability.