Totally agree. Flask (or any other micro-framework) is great for beginners because there is very little configuration and it maps closely to the request-response cycle. But, if you are working on a real project and have to ask between a full-stack or micro framework, you probably don't even know the things you are missing by choosing a micro-framework. A lot of thought has been put into Django, most Flask setups I have seen are not at the same level of quality.