Parse/Cognito/etc allow you to quickly validate an idea that may or may not work out without having to invest in a backend engineer and a bunch of backend infra

Parse/Cognito/etc allow you to quickly validate an idea that may or may not work out without having to invest in a backend engineer and a bunch of backend infrastructure. If it doesn't work, you've saved a bunch of time and money. If it does work, then you can start worrying about how to scale it and add more features. No piece of software has ever launched without technical debt, and there's much worse technical debt to take on than an outsourced backend.