Its meant to elicit an emotional response, which is a storytelling tool since the beginning of time. Anyways like I said you don't have to like it. In fact I'm sure most parents don't like seeing kids of any age put into danger in movies. They wouldn't be human if they did, which is the whole point, meant to elicit an human emotional response. But just like the stories of old, it'll continue to be used as a storytelling device.
Anyways, the sequel looks like a solid sequel to me. I'll wait to see it, but it may end up being the best Pixar sequel yet. Sure its plays on similar themes we've seen in previous movies, but so do all the other Pixar films.
BTW, in case anyone is wondering or didn't know, but you are all smart people so you probably did. The Incredibles is set in the 1960s, so the themes it plays on are an homage to the struggles of families in the 1960s. Which is why the sequel tackles the "mom goes off to work and dad stays home" story line, it was a real thing back in the 1960s.