You would only see the real value in these poolers in dire times. Screwing up apps or deploys leaking connections is really easy. If that happens you will bring down the whole DB. With these poolers you will not only be able to limit that but also enforce per user (service based if every service has it's own creds) limits. These tools are useful beyond certain scale and you will only realize there true value once you are working in distributed micro-service world specially when they are connecting to same DB.