I just put them straight on the grill next to whatever I'm making. My wife does the more complex stuff when needed but that sometimes make me feel dumb. I can figure out most things on my own but cooking is something I just have no interest in learning.

No, I mean eating. Part of eating is knowing how and what to eat. As discussed in the article, they're not eating vegetables and are choosing to eat things like fries or potato chips instead. You don't even need to cook most vegetables to eat them. In fact, for many vegetables it's better (nutritionally) if you don't cook them.