Well, first I wouldn’t give a junior dev with no experience admin rights to an AWS account and would I have tight guardrails around what they can do - like I’ve done now with over a dozen implementations for clients since I’ve been in consulting for five years and the four years before that as an architect for product companies.
I also wouldn’t give a junior dev access to production databases.
Also from working with AWS from both the inside (Professional Services) and the outside at a third party consulting companies, I know how aggressively AWS is about keeping startups and they would never risk losing the continuing revenue of a company like that.