If your kids start an activity, do you expect them to finish it even if they decide they don't like it?
Example: My daughter is in choir and she loves to sing but she hates her choir teacher because he doesn't warm the group up enough and she feels like he doesn't like her. So she wants to quit choir even though she's been promoted to a higher choir (the performing choir) next year. Would you allow her to quit or make her continue?
Or another example: Say your son wanted to play soccer so you signed him up for a team and half way through the season he decides he doesn't like it and wants to quit. Would you let him?