From the article:
When you have enough storage that you never have to delete anything, you can keep an infinite record of your life. Packages, receipts, itineraries of past trips, messages from loved ones, photos, appointments, documents โ you can just label them, archive them, and search for them later.
I don't want Google to have that information for free, to analyze/monetize/sell to 3rd parties. That's one of the reasons why I quit GMail. It was difficult too because I was registered to literally 100s of websites with that address.