Today, reading Color the faces of a graph I noticed that the OP downvoted Karl's students's answer and g.kov's answer. These answers, actually, do not use TikZ, but show how the picture the OP was asking for could be done with PSTricks and Asymptote.
Apparently, his motivations are
You didn't use a single line of code from my example that I am interested in.
as per comment 1 and comment 2.
I looked for some related posts on meta, but I was only able to find:
related, but not getting the exact point.
My question, therefore, is: is this good practise?
Honestly, my opinion is: no, definitely. In my view, it is always nice to have answers showing how to do things in other manner and/or with other packages.