I ate plenty of junk food , on my own, as a teenager.
Pizza and Chinese was the only takeout my parents brought home.
I did bring fast food takeout home for kids along with Pizza and Chinese, but the fast food was a rare exception and not as an excuse to forgo home cooking.
That was the Pizza and Chinese place at the family table at mealtime
Never gained weight because of junk food back in the day because of always being active.
As I grew older junk food became far less of my diet and didn't indulge to the point that it added unwelcome weight.
Now being up there in age and even with exercising a bit, junk food isn't
part of eating out or take home often, only an infrequent indulgence.
Can't see the big deal against it, like everything in life as you get older some things need to be cut down, but still enjoyed occasional.
Life has many choices and one must do what's best for them, but still find ways to enjoy life.
disclaimer: late night White Castle runs were part of my 20s, but those little grease burgers never put on weight, but didn't make for a good morning feeling when I woke up after a run the previous night
.