You may be correct if you mean your Smartphone cannot track another phone. However, there are devices and methods to locate or “track” your Smartphone even when it is turned off.
Of course it is a tracking device, and a great one at that.
I am amazed at the amount of personal data people willingly give up in exchange for convenience. To get directions, simply tell Google I am here and I want to go there. How much data does Google have about those two locations that they can combine with your data? What could they learn about you? Ultimately, who gets to see it?
The most frightening part of all this is biological data (fingerprints, eye scans, DNA, etc). You can't change those data like you can an account or a password. And once they're out there you can't recover them. No undo or delete.
Privacy is a very important element of freedom.