Stop in for a cup of coffee

So quick question for the mind trust, AKA coffee guys, Why does the V6 use a timing chain tensioner and the V8 does not?
Is it because the lobes on the cam are further apart and puts more pressure in the chain?

I was thinkin' the lobe separation would lead to less pressure on the camshaft from the valve train leading to a more free wheeling of the cam.