Because google is an advertising company, and makes money by spying on users. Google being found to scan emails received in gmail and advertise on that basis i

Because google is an advertising company, and makes money by spying on users. Google being found to scan emails received in gmail and advertise on that basis is why amazon receipt/invoice emails no longer include details inline. GMail is not a free product. You are paying google with incredible amounts of your "private" information.