Am I missing something? The author seems like they just don't want devs to maintain their build, so why not "just use someone else's fit-for-purpose container i

Am I missing something? The author seems like they just don't want devs to maintain their build, so why not "just use someone else's fit-for-purpose container image"? Whether that someone else is an external entity equivalent to buildpack maintainers, or your devops team, which should know Docker.