Glorification of childhood can be found often. Usually the argument goes something like this:
It was so great to be a child! No responsibilities, no taxes, no health concerns. School is much more pleasant than work. So much free time. Just playing and having fun!”
Parts of this can be challenged on factual level (free time, school more pleasant), but I won’t even go that route. Unpacking this would be a waste of time.
Any phase in life has pros and cons. What is so stupid about this way of childhood glorification is comparing the downsides of adulthood with the upsides of childhood while leaving the opposite parts out. Still the majority buys that and looks back to their own time as a minor with rose-colored glasses. Excessive nostalgia casts a distorting veil of self-deception over the memories of such clowns who oversimplify everything.