It's not. The extent to which old-line businesses like telcos and banks will literally sell your data is way beyond anything Google has ever contemplated. I can call a credit card data clearinghouse and order all of the transactions of every age 30-35 male in Akron, Ohio in December 2019 and they'll put that in a spreadsheet and send it to me. It really is important to distinguish between "selling your data" and what Google does in the course of business, because if you are unable to make that distinction then you aren't aware of the terrifying scale and specificity of the data provided by other industries.