Yeah we all go through a stage where we haven't mentally matured yet and have this tween-like rebellion reaction to any idea about changing for the better. Some grow out of it at a younger age, some at a normal age, and some not at all. I remember a bunch of examples I've seen happen through the decades;

"You say i shouldn't eat meat, well i say nuh uh! Now I'm gonna eat twice as much!"

"You say i shouldn't smoke cigarettes, well i say nuh uh! Now I'm gonna smoke cigars too!"

"You say i shouldn't be racist, well i say nuh uh! Now I'm gonna be even more outrageously racist!"

It's just a non-thinking reactionary response to the idea that you aren't perfect.