Cost analysis has helped me build great infrastructure on AWS. The costs are communicating to you what is and is not efficient for AWS to do on your behalf, by analyzing the costs and working to reduce them, you also incidentally increase efficiency and in some cases, such as this one, workload durability.
Cost analysis should of course play the foundation of everything you build, regardless if it's SaaS tooling or infrastructure. But surely it's easier to do a cost assessment and optimization exercise on something that is fundamentally more affordable than AWS and doesn't have as high of margin costs? That's why we have built a platform that creates all the value at a low cost.