YMMV.

Directly, yes maybe. Many companies don't have in-house experts (and get shafted by vendors as a result, as they're lacking the competence required to assess the quality of work).

But indirectly, they all have. In Germany, at least, you're required to have electrical appliances inspected by a licensed professional (an electrician or otherwise qualified person) at least every two years - most companies opt for using dedicated external companies, but you can also train someone for that task. On top of that come all the electricians hired by the landlords - the ones dealing with complaints and remodels, or servicing lifts, escalators, HVAC, datacenters, ...

Electricity as a Service, which includes payments for expert maintenance.

Thread is about AWS and merits of in-sourcing, which is not how the world operates.

Anyways.

As long as dev's don't seem to understand real world limitations, (for instance, a network cannot be instantanious, and latency is not consistent) and thus leave tons of performance on the table, i think the "infra guys" will be just fine.

Also, don't forget there is an entire world out there of people making sure connections to the cloud are even possible across the internet.