Earlier quoted context omitted.
Have you had AWS tech advisers advise teams in your company to go with this stack? Because I haven't. AWS doesn't have an equally distributed interest in selling all of its products. Some AWS products exist because customers need/demand them and others exist because they provide higher margins and tighter lock-in to Amazon: the first type of products are great for customer acquisition, the role of their sales folk is…
I've never knowingly had an AWS solutions architect recommend something because it would make AWS more money in the short term. The most frequent advice I've seen from them has been on how to give AWS less money by making use of different features, or changing how particular services are being used.
I've done the AWS solutions architect associate level cert and I can tell you first-hand experience that in order to pass the exam you need to memorize a lot of AWS propaganda that was written primarily to optimize AWS profit, not to optimize customer satisfaction. How many of those solution architects take those materials with a grain of salt vs how many of them genuinely believe that crap, I don't know.