Science is a means to an end, the 'giving proper credit' bit has been under fire since the day that someone figured out that citations can bestow fame (hardly every fortune) and given the low stakes it is to be expected that that is the battleground. But the number of PhD students that have been screwed out of proper credit to further aggrandize their academic masters can probably not be enumerated any more, so let's not pretend that proper credit is the coin that makes academia function.
This just in: A wrong thing become right when famous people (allegedly) do it. More at 9.
And that's aside from the fact that you're wrong on the particular case of W&C.
I'm pretty sure the claim was that it's not so "fundamental", not about right or wrong.
Can you explain what this means? It's a pretty broad statement.
Giving proper credit to prior work is a fundamental component of scientific progress. Just look at the Chinese academic system to see what happens to science when people are given free reign to plagiarise.