I've been in a similar situation - a surprising amount of companies really just click to create instances. Last time I've encountered that at a customer I improved things a bit by creating templates, and scripting instance creation based on those templates - but ideally we'd have had the templates themselves as well as the network side generated by ansible.

But that's the problem: The complexity of doing that properly is pretty much the same as just doing your own hardware (which is what I'm working with most of the time - handling stuff on physical servers). And at that point the question should be why you're paying AWS so much money and pay your people to automate AWS workflows when you could just pay them to automate workflows on physical hardware, which would be way cheaper to run than the AWS instances.