Yes, grit is much more how much you stick to things you've chosen.
Consider two scenarios of a child playing who soccer:
Child 1 hates soccer, but is forced to play by their parents: I see no lack of grit in such a scenario if the child resists going to practices & games and pushes his parents to let him quit.
Child 2 likes soccer and wants to play. However, in their first game they play goalie and the team loses 3 to 0. If the child doubles down and decided to practice more, that is grit. If they get discourages and want to quit, that is a lack of grit.
Obviously there's still more to it than the relatively simple outline here, but it shouldn't be considered a universal ability to do any & everything or never abandon a project.
Consider two scenarios of a child playing who soccer:
Child 1 hates soccer, but is forced to play by their parents: I see no lack of grit in such a scenario if the child resists going to practices & games and pushes his parents to let him quit.
Child 2 likes soccer and wants to play. However, in their first game they play goalie and the team loses 3 to 0. If the child doubles down and decided to practice more, that is grit. If they get discourages and want to quit, that is a lack of grit.
Obviously there's still more to it than the relatively simple outline here, but it shouldn't be considered a universal ability to do any & everything or never abandon a project.