The most childish thing is trying to be an adult with absent understanding of why. Horrifying are the people who have kids just to keep up with the Jonses.
The parts I see actually worthy of concern of childishness are disregard for how things work and what it takes to achieve them. Relatedly there is a third issue of dependence but it has too many other non-attitude causes. These are my own admitted biases.
Childishness is a rather useless conflation of all. Humans are childish compared to great apes. Curiosity and tinkering are also childish but they have brought us the furthest forward.
The parts I see actually worthy of concern of childishness are disregard for how things work and what it takes to achieve them. Relatedly there is a third issue of dependence but it has too many other non-attitude causes. These are my own admitted biases.
Childishness is a rather useless conflation of all. Humans are childish compared to great apes. Curiosity and tinkering are also childish but they have brought us the furthest forward.