[dictum]

Part of the problem is how the TOS is deliberately obscure long form text while the UI (which does not make the data sharing explicit) is nice, polished and A/B tested for maximum engagement [0].

Were the same information design effort applied to explaining the data collection and sharing, all users would at least know what is happening.

Most users should know/intuit how this pervasive data collection/sharing can have unwanted side effects, even without such nicely designed explanations, but one of the most effective rules of UX is don't make me think.

[0]: "Frictionless" in practice means "don't wait, start using this now and only think about it later".