You're dead on right about everything and you especially nail the appeal of Batman (and why I believe continually casting Batman as a man in his 20s rather than his 30s or even 40s is wrong). Batman is a child's fantasy of adult life while Superman is more of the reality of adult life (mid-level office job, unrequited crush on co-worker, etc).

But I specifically quoted the most pertinent part because a child of the 1940s has almost nothing to do with a child of the 2010s.

Kids don't do anything anymore, except play video games and watch TV and hang out on the internet. They especially don't go outside and jump bikes off ramps or do anything dangerous because their useless mothers can't bring themselves to cut the umbilical cord. And when kids play video games they do so while screaming profanity and racial epithets into their headsets, and when they watch TV it's reality garbage starring sex tape queens and when they hang out on the internet they tweet mindless garbage and psychologically torment their peers and watch porn.

Children of the 1940s might have been innocent enough to not draw a sexual connection between Bruce Wayne and Dick Grayson but you'd hard pressed to find a kid under 10 who possesses such an innocent mindset, especially when warnings of creepy sexual behavior are drilled into their brains. Most kids would see Robin's originally costume and dismiss it as gay. And forget about those panels of Bruce and Robin sleeping in the same bed. Today's kids can still accept the wild adventures of Batman and Robin but they can't accept those little booty shorts.