I would guess when a child raises their hand and asks "What's the purpose?", they'll be given the same answer for ID as for evolution.
If these questions are so important to you, then I expect you have an answer for it regarding evolution.
Well, I understand the theory of evolution. If a child were to ask me about it, I could explain it in a reasonable way and provide multiple examples.
Right now, I can't do that with the ID theory because I simply don't understand it. I asked someone else whether or not it is religious dogma or scientific theory. I think after seeing most of the responses on this thread, the former seems to be the answer.