Fixxer, I totally agree that it's great that one be capable of doing these things, but sometimes it's not as important as other things that could be taught. Like acbart, sometimes I want to teach why/when to use a statistical algorithm and not teach them how to grab all the dependencies, troubleshoot whether they have gfortran installed, etc. This problem is horribly compounded teaching undergrads when you have Windows, Linux, and Mac users in your class, where the procedures for getting a working scientific stack vary, and the errors are often not the same across platforms.

When I install the scientific python stack on a new machine, I almost always just use Anaconda. I already know how to install the stack (I'll always value the weekend I spent in undergrad fighting with a customized BLAS in R!), but sometimes I have more pressing/fun things to do.