For the most part people can't seem to distinguish claims data vs healthcare records...its pretty scary as these are the most likely people to receive funding to "disrupt" the health care industry.
Claims data is not equal to medical records, but to your point it is extremely valuable data and can easily act as a proxy for medical care. Even more so when tied together with Rx claims data. Even providers (Doctors/hospitals) themselves don't have access to insurance claims data for patients...which unironically results in perhaps a million hospitalizations and billions of dollars in healthcare costs per year because of the lack of data sharing with providers.