That is what "end-to-end encryption" has come to mean in marketing. In the same way that every single product is "natural."

All natural blends of hydroxyapatite, sodium laureth sulfate, and methylpropanediol, just like grandma used to make

Is HTTPS really always E2EE?

I was under the impression that large companies use proxies so they can do deep packet inspection.

PS: you are right of course.