I have been following this morning's comments, and I think Roothog nailed it. It depends on the kid and the situation. For my kid, I can see the PO thing potentially coming on his high school team . . . to be clear, it looks like he'll be the starting 3B on JV when he's not pitching, but the pitchers get fewer reps on infield and batting than the position-player-only kids, and the way it ends up on varsity is most pitchers (like, 80%) do not contribute meaningfully in the field, even if they are not officially designated as a PO (e.g., a kid might be the 5th or 6th outfielder). For this and for a few other reasons, I could see it developing where he contributes significantly as a pitcher and not much as a position player.
Now, to give CACO3GIRL and IOWAMOM23 their due, I want him to keep his options open. It is not clear to me where he projects better. He's only in 9th grade. On his travel team, which is fairly well known nationally (not to the level of an org like the Canes, but known, with dozens and dozens of graduates playing professionally right now), the situation is flipped -- he plays MIF and some 3B and has pitched only once (because he is not available, as he is pitching for his high school, and we won't let him pitch for two teams the same weekend), and he gets plenty of opportunities as a position player. It will be an unusual situation if he ends up pitching for his HS team and a position player, or during the summer playing both ways, for his travel team. In every instance I have seen with this travel team and comparable teams, it is the opposite -- two-way for the high school, PO for the travel team.
Anyway, as Roothog said, "If we were not yet sure whether his best bet was as a pitcher or position player, it might be worth the decreased exposure to have a chance to further develop his position and batting skills. It's an individual decision that has to be made subjectively."