Let's take a more rational view of this dynamic. The term "club-hopper" is pejorative, and intended to create bias against those who change clubs. Then the conversation drifts into issues of "loyalty," another loaded term intended to make "club-hoppers" seem ungrateful for everything their prior club(s) may have provided. Finally, the conversation second-guesses the motives of parents who move their daughters to different clubs, presuming that they do so for their own reasons, rather than being motivated by the best interests of their children.
Starting from last to first, you shouldn't second-guess a parent's motives. There are legitimate reasons to move frequently from club to club. Different club objectives, different coaches and different teammates can broaden and enrich a player's training and soccer experience. And if a player is moving from less competitive teams to more competitive teams, then there is a pretty good argument that the player is benefitting by competing against better players every practice and game.
As far as "loyalty" to a club, team or coach goes, that is just stupid. Players and their families are consumers paying for a product. They should choose whatever they believe is best for them at the time; not for somebody else. Just because you started with Verizon doesn't mean you have to stay with it forever.
Finally, if your club or coach doesn't like "club-hoppers," then they should stop taking them on their teams. The "club-hopping" families are well-known. Bashing the "club-hopper" is like blaming the prostitute without ever blaming the John.
