Yes, but docker has created an incentive to publish them. When I want to install something, I search for a docker image that has it preinstalled and I read the

Yes, but docker has created an incentive to publish them. When I want to install something, I search for a docker image that has it preinstalled and I read the dockerfile. I can choose either to use the docker image or to perform the installation globally on my main system. And, by the way, I have learned the installation procedure.