Its a matter of evaluating what kind of infrastructure your application needs to run on. There are certainly mission critical systems where even a sliver of downtime causes real damage, like lost revenue. If you come to the conclusion that this application and everything it involves better run on k8s for availability reasons, you should probably focus on that and code your application in a k8s-friendly manner.

But there are tons of applications that run on over-engineered cloud environments that may or may not involve k8s and probably cost more to operate than they must. I use some tools every day where a daily 15 min downtime would not affect my or my work in the slightest. I am not saying this would be desirable per se. Its just that a lot of people (myself included) are happy to spend an hour of their work day talking to colleagues and drinking coffee, but a 15 min downtime of some tool is seen as an absolute catastrophe.