I get the benefits of SaaS. I get the benefits of hosting things in your own infra. Why can’t Atlassian licence their private docker images and allow companies

I get the benefits of SaaS. I get the benefits of hosting things in your own infra. Why can’t Atlassian licence their private docker images and allow companies to host things in their private cloud? Like why isn’t paying for docker images with k8s yaml files that you can host on your own cluster a thing ? I would pay for that.