Why does MMA target WC?

[HumbleWCGuy]

from your choice of statements its obvious you dont understand the difference in whats going on in each clip and why.
Let me help you and others.

1st clip is the fighting distances and forces you will be in to actually hit and exchange power in a punch with parries, using a balanced stance in controlled exchanges. To help develop your technique for sparring. You can see clearly in the 1st clip both guys being coached look like either in the second clip

2nd clip is why we do so much of the 1st clip

This sort of stuff has limited effectiveness in preparing you to spare against a skilled opponent.
http://www.youtube.com/watch?v=VjcozWSvpjs
This is a bit closer to effective drilling
http://www.youtube.com/watch?v=Flkvnk8cPB8
Phil's site has some decent drilling as well.