Importance of omega 6/3 ratio

There's a lot of discussion in the literature about the importance of the omega-6mega-3 ratio. I hadn't seen an explanation of why the ratio was important until recently when a I came across the following at [chriskresser.com]

"Omega-6 competes with omega-3, and vice versa
As you may recall from the last article, n-6 and n-3 fatty acids compete for the same conversion enzymes. This means that the quantity of n-6 in the diet directly affects the conversion of n-3 ALA, found in plant foods, to long-chain n-3 EPA and DHA, which protect us from disease."

So the competition only effects the conversion ALA into EPA and DHA. Consequently if you get your EPA & DHA directly from seafood sources (which is what most of us rely on) you need not worry too much about not getting much benefit from the ALA in your diet.

Josiah