"You're not being deprived of something"
I'm being deprived of my right to privacy but more tangibly I'm being deprived of the value of the data they are stealing. My browsing history is data that belongs to me and only me and they are stealing that data and then selling it. The proceeds from any sale or use of my data are rightfully mine. They are also violating my copyright. My browsing history is a one of a kind creative work.
"it's information that you're sending them when you use your browser"
A quick change artist is literally being handed the incorrect amount of money by a representative of the company they are stealing from at the register, it is still theft. The same with me handing over my data in a man in the middle attack (which many of these collection tactics effectively are). It was not my intention to give them my data, I did not knowingly or willingly agree to their cookie or tracking, therefore it is also unauthorized systems access. And no, the legal section or terms and conditions section being present on one of the websites I visited does not constitute a meeting of minds.