Well, they're off by default in the countries mentioned in the top-level comment because they're legally required to be opt-in there (the implementation rather than the feature of course, but it couldn't really be otherwise).
I suppose, to your point, Google doesn't have to make it optional in other countries... But that discrepancy would seem to have a lot of downside (maintenance, optics, docs) for little upside (...force adoption against the will of users who would go out of their way to opt out of they could?).
I suppose, to your point, Google doesn't have to make it optional in other countries... But that discrepancy would seem to have a lot of downside (maintenance, optics, docs) for little upside (...force adoption against the will of users who would go out of their way to opt out of they could?).