This seems too easy a recipe to be worth it in the medium term - there is no moat. Better cover your data with very strict laws, like google does with its exclusive deals for medical data use.
Data that is expensive to acquire is the best long-term play for an ML company. Either expensive due to regulations or expensive due to the quality of sources. Ideally both.
The laws were already quite strict (HIPAA) and the data relatively inaccessible.
Google jumped through all the hoops to get it. And an exclusive contract never hurts no matter what the service. (Logistics, payment processor, etc.)
Thats why this is unfair. The health industry incentivizes (and often mandates) open publishing of scientific results, but patient data is reserved with gold chains for the exclusive use of google