Ever since Romanticism, an oppositional mode, artists have the right, and indeed the duty, to attack social convention. But it is ridiculous and in fact self-infantilizing for them to expect to be financially supported by the general public whom they are insulting.
The bravest person I've ever met was a young boy going through massive amounts of treatment for a very rare, complex and unpleasant disease. I last saw him at a Discworld convention, where he chose to take part in a game as an assassin. He died not long afterwards, and I wish I had his fortitude and sense of style.
A child-like man is not a man whose development has been arrested; on the contrary, he is a man who has given himself a chance of continuing to develop long after most adults have muffled themselves in the cocoon of middle-aged habit and convention.