Yesterday I realized that I have overlooked the default installation method of the sealed secrets controller for kubernetes kubeseal this whole time an jumped straight to the helm section. I spun up a quick kind cluster and had it up quickly. I can’t say this is any better or worse than helm as I have never needed to customize the install. According to the docs you can customize it with [[ kustomize ]] or helm.
# option if you don't have a cluster try with kind
kind create cluster
curl -L https://github.com/bitnami-labs/sealed-secrets/releases/download/v0.27.0/controller.yaml > controller.yaml
kubectl apply -f controller.yaml