Hot dogs are 3x as calorie-dense as deli turkey? Are they really that fatty?

Now I want a meal with all of these things in it, in these quantities.

I had this thought the other day, well, it's been a bunch of ongoing observations. I was a fat kid, mum had us eating healthy, but I was a really fat kid. Once I learned how to count calories, I was a regular, healthy weight young adult, as I am still today. Recently, my wife complained she'd gained a bunch of weight, I said "well yeah, your calorie intake to sedentary is out of whack" and she said "HEY! I eat healthy!" - I said, "sure, healthy but very calorie dense" - I watched her then adjust her eating a bit over the following month and then finally I asked her "do you know how to figure out about calories and stuff?" and she said "huh??" and so I explained BMR/TDEE and her mind was blown, so then I asked mum if she knew anything about calories and she said "only that they print them on the label" - funnily, my wife and my mother are both highly educated, and, I didn't know till I was in my early 20s.

Is it the case that very many people don't know about how calories work?