Its fairly simple.
The repercussions of violating privacy are much higher for Google than they are for other companies. Therefore logic dictates that Google will do more to prevent these violations.
You'll have to demonstrate that the bolded part is true. For example, this story contradicts it.
Apple, for example, treats customer privacy as a feature with which to sell their products. I'd suggest Apple's incentive for protecting privacy is greater than Google's.
If the typical company lets your private data get out (and as I'm sure you know, many have) they still have products to sell. Google's product *is* that data. They have nothing else. If the data gets away from them *or* if they lose the confidence of the public to keep it safe, Google is out of business, the end for them.
But the data here *did* get out, and not only that, but this is by their design and not an accident. The same goes for magazine subscriptions. On the Play Store, the publisher gets your name, email, and home address. On iTunes, the publisher can ask for it, but you can say "no" and you get the exact same magazine, no limitations. On Google Play, your only option is to not subscribe at all.
Do you want your data held by a company that specializes in making consumer electronics, or a company that specializes in *data*?
The former, because I trust Apple. And you are still glossing over the fact that Google collecting the data already *is* an invasion of privacy.
The only reason I have, up to now, accepted Google's inherent privacy implications is that, like you, I assumed (wrongly) that they would keep it all in house. That the worst of it was that I'd get ads based on my emails and such. And this data collection also allows for some very cool (if creepy) things like Google Now.
Unfortunately, for me, this is the last straw. Google has asked for a *lot* of my data, far more than Apple ever has, and with that data comes a degree of trust. Google has violated that trust in my mind, and will not get it back easily.
Were Apple to ever to the same, I'd have a similar response.