Yeah good question. Sibling comments to this one explain it well, but basically AWS managed services come at a premium price over some equivalent running in jus

Yeah good question. Sibling comments to this one explain it well, but basically AWS managed services come at a premium price over some equivalent running in just EC2. (Some services in fact do charge you for EC2 time + the service + storage etc.) "Managed" usually means "pay us more in exchange for less work on your part". This is usually pitched as a way to reduce admin/infrastructure/devops type staff and the overhead that goes along with having those people on the payroll.