He doesn't want to manage the database the way he manages the rest of his infrastructure. All of his bullet points apply to other components as well, but he's absorbed the cost of managing them and assigning responsibilities.

- Crud accumulates in the [infrastructure thingie], and it’s unclear if it can be deleted.

- When there are performance issues, infrastructure (without deep product knowledge) has to debug the [infrastructure thingie] and figure out who to redirect to

- [infrastructure thingie] users can push bad code that does bad things to the [infrastructure thingie]. These bad things may PagerDuty alert the infrastructure team (since they own the [infrastructure thingie]). It feels bad to wake up one team for another team’s issue. With application owned [infrastructure thingies], the application team is the first responder.