What is more likely to impact you negatively: Google building an internal profile based on your information and targeting ads based on it or your card information being stolen from insecure smaller vendors?
Obviously those 2 choices are picked arbitrarily but they may explain why the OP chose to prefer the former over the latter. I would think every time we decide to share some of our information we do so because we stand to gain something (otherwise why do it) and it's up to us to decide if what we stand to lose is worth it. As technically minded people we tend to be more focused on technical problems and what we consider more dangerous may be more related to our familiarity with the subject matter rather than the objective potential negative impact it has.
As for the magnitude of privacy invasion regarding financial transactions, I feel very safe in saying the data Google has about/from me is far more revealing than relatively opaque transaction logs.
Also, if you've been here long enough to get sick of anything you should have learned that dumb downvotes happen, they mostly get reversed over time, and nothing good comes of reacting to them at all, much less throwing a expletive-laden fit about them.