It is an opinion not based on facts.
Story is non essential in a RPG. All it takes in a RPG is situations.
P&P RPGs rely on scripted stories because there is barely no other way to introduce RP situations and string them together.
Computers can deliver stories in different ways: through scripting or by letting the player string by himself narrative events that the game world produces. While the second is usually better done than the first, and totally appropriated to developp a RPG around. Unsurprisingly, RPGers by title prefer the first option over the second.
Immersion is too vague a concept to mean anything.
Certain players consider this feature does not immerge while they dismiss another feature of the same wood, that is as immersion breaking as the previous one.