Adds Rationale section in the PEP (#2966)

pep-0582.rst

@@ -45,6 +45,17 @@ being introduced to Python (or programming for the first time).
   as in a previous terminal with virtual environment activated.
 
 
+Rationale
+=========
+
+Python is a beginner friendly programming language. But, so far virtual environment(s)
+is the major time taking part of the learning process of a new person. This PEP is not
+trying to solve every packaging problem, but focused on the 90% of the new folks who
+struggle with virtual environments in their learning path. Creating a new directory
+is still far easier than learning the details of virtual environments in various
+platforms.
+
+
 Specification
 =============