I wish I could say that it caused me humor every time I come across this type of justification for the ever-quickening erosion of the concept of personal privacy in the era of big tech. Here's why my gut reaction to interpreting Google's behaviors starts from the core assumption that they are pursing ever-greater levels of privacy-eroding ad tech in nearly everything they do:

0) Google's only purpose is to make money.

1) Google's strongest strategy (by orders of magnitude) for making money is targeted advertising.

2) Google has surpassed the critical size threshold beyond which morality plays no role in business decisions (see surveillance state-supporting tech in China among other issues).

Due to these facts it appears inevitable that Google will seek in all of its large-scale actions to involve ad tech in whatever it produces or engages in. It's how they fulfill their purpose (selling the most sophisticated targeted advertising possible).