If you join an early stage startup today, it will only be a matter of time until a developer comes in who builds a microservice for what would normally be a single function calling a third party api and then discovers that Kubernetes is necessary. Its almost impossible to stop this happening because business folk want microservices, or they might have heard microservices were going out of fashion but still want Kubernetes...which is only really necessary for microservices.

Devs like to have fun, learn new things, play with complicated things - that's all it is. It counteracts the dull features that most developers have to ship.