If you only work at startups you may never really know what the real industry best practices are. The people who are best on any given topic have a tendency to keep it a secret, so you're not necessarily going to be able to learn it outside of direct experience. Startups will often choose the expedient and obvious path to shipping that MVP, even when that pattern has known problems. Of course you can choose an innovative startup and get the opposite experience, but you'd have to choose it carefully and probably on the basis of personal relationships to be sure.