Lots of people have some the problems k8s solve. Infrastructure as Code - If you're not doing infrastructure as code, how do you know who is taking what action

Lots of people have some the problems k8s solve. Infrastructure as Code - If you're not doing infrastructure as code, how do you know who is taking what actions on your infrastructure? How do you know your tests are running on an environment that represents production? How do you know the tester or dev hasn't fixed and not commited? CI/CD - Do you have a quicker way to create test environments than just running kubectl create ns? Resource Utilisation - Sharing servers to save money. Obviously you can use VMs, but do you want to do nested VMs on cloud? I'm not sure most people should run k8s, but in a world where you can use GKE, I can't really see why not. What offers a better solution?