run entire aws infra locally while studying for aws certification?

Let’s rephrase the question then, why makes an application dependent on AWS?

AWS skills are in quite strong demand, so it totally pays off to know the platform and have some hands-on experience if you work in the related area.

In general that would be a good question, but you've asked it in a case where "use AWS" is the _only_ way to accomplish the goal... which is learning AWS.

You commented on a post that included When I was doing cloud training with A Cloud Guru which is cloud certification platform. Can’t run “locally” getting prepped for an AWS certification and AWS is absolute shit for beginners in terms of cost protections