Dont use third parties
Those with a clue don't need too. One can own and control the server one syncs/dumps/stores data on (just don't use an off the shelf NAS or ISP owned cheapo router).
Consumers have no choice and consumers are most likely to not have understanding of what any of this means... Oooo that's easy I don't have to think. Here ya go take care of my privates.
And guess what, those that are making money from selling broken systems don't really give a shit providing the lawyers draft a EULA that admonishes them of responsibility