Roleplaying is about engrossing yourself as another character. The Japanese seem to have a misconception about what that means or maybe just the ones among them that make console games do. It means you are taking on that personality of the character. If the character, as in Japanese made console RPGs, already has a fully functioning persona without you, then you are not doing that.
The term does have to have some qualifications within the electronic pre-programmed realm of computer and console games, however. It may not be entirely possible to give the player all the opportunities to take on a personality, to act it out. So, they have to at least make a noticeable effort to try to account for multiple possibilities. Once again, if the character already has a personality that he's acting out for you, then they're not even trying and it's not an RPG.
It's a position I've remarked on multiple times on this forum and others.