It's incredible to me that he watched Simple Made Easy (which is an incredible talk), and his mind went to "stick more stuff in the database". Not because that approach wouldn't work, but to me a clear sign of complection would be conflating the medium of data storage (a database) and the business rules that govern the data itself. But I guess that's the the sign of a good talk. It's open to interpretation.

It also complicates your scaling story, your caching story, your ability to change databases and a great number of other things.

If you're building an app that has no chance of ever possibly needing to scale, or use a different database for caching, searching, or analytic reasons, then this approach may be optimal, but if any of those levers need to move at some point, I think you'd be in for a world of hurt.