The very reality that you are a fan of Mary Poppins shows that you are complaining about things being viewed as appropriate for children when you don't feel they are when you yourself view something as appropriate for children when it isn't. I think that you should be glad that Mary Poppins is still considered appropriate for children when as well as being a terrible film for many reasons, like that it is extremely boring, cheesy and corny, it involves Mary Poppins saying "Spit Spot" so often that it is annoying, Dick Van Dyke doing a terrible attempt at a cockney accent, it being too long a movie, including songs which hurt my ears, children who are so well behaved that they are boring, Mr Banks being constantly gloomy and Mrs Banks tolerating his Sexism despite being involved with feminism and also insulting men [which gives the message that this is what feminism is about], it shows Mary Poppins becoming the nanny for a family because she bullies other ones out of the way and arrogantly claiming that she is perfect, it also shows Mary Poppins being extremely distant with children and gaslighting them. Nobody claims that it is inappropriate for children [although I think that it is inappropriate for everybody] so if you are a fan of Mary Poppins then there is a probably a lot else which by your logic is appropriate for children. I'm not saying that nothing else is inappropriate for children, just that I'm not sure if you are a good judge of that yourself.
The very reality that you are a fan of Mary Poppins shows that you are complaining about things being viewed as appropriate for children when you don't feel they are when you yourself view something as appropriate for children when it isn't. I think that you should be glad that Mary Poppins is still considered appropriate for children when as well as being a terrible film for many reasons, like that it is extremely boring, cheesy and corny, it involves Mary Poppins saying "Spit Spot" so often that it is annoying, Dick Van Dyke doing a terrible attempt at a cockney accent, it being too long a movie, including songs which hurt my ears, children who are so well behaved that they are boring, Mr Banks being constantly gloomy and Mrs Banks tolerating his Sexism despite being involved with feminism and also insulting men [which gives the message that this is what feminism is about], it shows Mary Poppins becoming the nanny for a family because she bullies other ones out of the way and arrogantly claiming that she is perfect, it also shows Mary Poppins being extremely distant with children and gaslighting them. Nobody claims that it is inappropriate for children [although I think that it is inappropriate for everybody] so if you are a fan of Mary Poppins then there is a probably a lot else which by your logic is appropriate for children. I'm not saying that nothing else is inappropriate for children, just that I'm not sure if you are a good judge of that yourself.
Did you do sufficient research to see if this is true? This book looks fake.