It really depends on what other uses are made of that information.
The question about big data has already been raised several times, and that seems to me to be crucial here, because there are many bits of information about us that are far more trivial than our birthdates, and they can be used, once they are concatenated with other data, to create a profile of us so that we end up with profiles that exist within both corporations and law enforcement and national security agencies that are fictions, in a sense, because they are a creation from tiny fragments of data collected from all over.
That, it seems to me, is an issue we really have to address within any attempt to revise these laws.