I never even implied that system packages do not have their uses, or that python packages are free-standing of libc. That is just a straw man.
In fact, I agree with you for system libraries or tools which happen to use Python and really do not need virtualenv because they are really system-global.
Where I don't agree with you is with use cases you clearly don't understand, where you are developing and/or running multiple python apps in which you NEED isolation or you NEED to manage the versions of your dependencies. Your package manager is not helping with that at all.
And if you don't understand these tools and configuration management tools, then you should not be a sysadmin for projects which involve significant amounts of Python or Ruby.
In fact, I agree with you for system libraries or tools which happen to use Python and really do not need virtualenv because they are really system-global.
Where I don't agree with you is with use cases you clearly don't understand, where you are developing and/or running multiple python apps in which you NEED isolation or you NEED to manage the versions of your dependencies. Your package manager is not helping with that at all.
And if you don't understand these tools and configuration management tools, then you should not be a sysadmin for projects which involve significant amounts of Python or Ruby.