"Who took us out of Egypt"?! What about "who created the Heaven and Earth"? Surely stage-managing the Exodus doesn't even approach His role as designer and creator of the universe!
I remember hearing a comedian describe his feelings on finally having children: "I was less willing to put up with fools. I was like, 'I don't need this, I can make my own people now...'"
Just as a guarantor for a loan knows that he can be called on at any time to make good his pledge, so too we've got to educate children to appreciate and live up to their responsibilities...
The awesome sounds of G‑d resonated throughout the universe... but there was no echo. The greatest sound and light show in history was a strictly one-time production with no residuals or encore.
G‑d started off perfect and hasn't changed since; we're the ones who need to shape up. We're the people who should be setting off on the great journey that starts on earth and ends at Sinai. Why should we expect G‑d to come down to us?