How do you configure S3 access control? You need to learn & understand how their IAM works.
How do you even point a pretty URL to a lambda? Last time I looked you need to stick an "API gateway" in front (which I'm sure you also get nickel & dimed for).
How do you go from "here's my git repo, deploy this on Fargate" with AWS? You need a CI pipeline which will run a bunch of awscli commands.
And I'm not even talking about VPCs, security groups, etc.
Somewhat different skillsets than old-school sysadmin (although once you know sysadmin basics, you realize a lot of these are just the same concepts under a branded name and arbitrary nickel & diming sprinkled on top), but equivalent in complexity.