My view on junk foods and PUFAs is that they’re not a big deal, but most foods that are high in PUFAs aren’t all that amazing anyway. I look at most added oils as empty calories that don’t contribute much flavor.
As an example of what I mean, I like to eat potato chips and fries sometimes (and I’m worry about them hurting me), but a baked potato with butter and sour cream gives me more enjoyment.
If nothing else, eliminating PUFAs and junk food could aid weight loss because they’re the cheapest sources of empty calories. Plus, it’s easier to eat less of high quality food, because it’s more satisfying.