Pods are (almost) useless (by themselves)

Pods are fundamental building blocks in Kubernetes. In most cases, you will not create Pods directly. Instead, you'll use higher level constructs like Controllers.

Pods are disposable. They are not long lasting services. Even though Kubernetes is doing its best to ensure that the containers in a Pod are (almost) always up-and-running, the same cannot be said for Pods. If a Pod fails, gets destroyed, or gets evicted from a Node, it will not be rescheduled. At least, not without a Controller. Similarly, if a whole node is destroyed, all the Pods on it will cease to exist. Pods do not heal by themselves. Excluding some special cases, Pods are not meant to be created directly.