Because they have literally the worst technical support on the planet earth.
21 years in, the only way to get effective support from Google is to have friends who work there. Going in without personal connections is like trying to get a liquor license from the Ottoman Empire. https://t.co/T1KvCR14cY
— Pinboard (@Pinboard) May 3, 2019
Without knowing someone, or sending a letter from a lawyer, it is effectively impossible to get help if you have a problem with their services.
If you are going to rely on a company for mission critical applications, and you are not only unable to reach someone competent, but you are completely unable to reach anyone, period.
Beyond self dealing, extracting monopoly rent, and behaviors that would be called stalking if it were not coming from Silicon Valley, they have nothing to offer.