Operators are one of the most powerful tools when you are working with Kubernetes, especially when you are in a scenario where Stateful conditions are required like ordered and automated rolling updates, or graceful deployment/deletion and scaling/termination. The problem, however, is writing and building Operators require deep knowledge of Kubernetes internal and a lot lines of code.
Using Kubebuilder requires writing thousands lines of controller code in GO and existing implementations often don't cover the entire lifecycle. You can also go for Operator Framework in order to use Ansible or Helm charts but both have some limitations.