I think you're conflating platform engineering and operations. A DB2 cluster with HADR is another application that some engineering team has stood up. A consume

I think you're conflating platform engineering and operations. A DB2 cluster with HADR is another application that some engineering team has stood up. A consumer of the database isn't responsible for the implementation; they're responsible for how their code interacts with and uses the system another (engineering) team built. In that regard, if a developer sees their application degrading due to an issue with the underlying platform, they'd engage the developers that built that platform (and ideally those developers have built a system to detect problems before the "end user" system starts degrading) In the same vein, it's not expected every developer understands kernel and hardware development--there are abstractions and boundaries in place that separate responsibility. The recurring theme is the person that configured/coded/built is responsible for operating it