Why would Google be a reliable source on whether Google does(n't) violate privacy laws and parents' privacy concerns? It has been shown in the past that they violated the 'Family Educational Rights and Privacy Act':
They were also tracking students once they used Google services that were not covered by Google Apps for Education (which is kind of hard to avoid, since you have to sign in on a Chromebook):
https://edu.google.com/trust/
People should read that and form their own opinion either way.