> Makes sense for whom? Maybe for them, certainly not for their clients.
It makes sense for the system, and thus for the client.
Just because there are a lot of boxes in the diagram that does not mean the system is complex. A lambda is just a stateless message handler. Half the diagram are lambdas. The rest is just a few persistence services and then stuff related to external interfaces, likr DNS services and API gateways and auth and pubsub.
Any desktop app is way way more complex than this. A dialog box has easily twice the number of handlers.
If the firm is fast and produces reliable platforms at the cost the client is looking for then their clients couldn’t care less whether it’s Django (sigh) or Lambdas.
