Google DeepMind is building a blockchain-style system for healthcare

Except for the part where it's not actually a blockchain?

By that definition, Certificate Transparency is also a blockchain. Except...it's not.

I also like how they make a big deal about the "trusted" hospitals and whatnot. As if hospitals couldn't possibly be sabotaged.

The whole point of blockchain is that it's a network of untrusted users. That's one of its main features. Having a "trusted" network is almost a downside, from this point of view. The certificate authorities are also a "trusted" network. But I think we've learned by now just how "trustworthy" they can be.