I think that both sides of the brain are important. Math, science, and language arts are all subjects that are important aspects in our daily lives and prepare us for our future. Music and art are also important because it exercises that creative part of our brains. This is also helpful in solving problems because of rather using a mathematical approach to a problem, you can use a creative way of looking at the issue which can sometimes be a better way of solving problems. With this being said I think that it’s important that schools teach regular curriculum (math science and language arts) along with art education(music, theatre, etc. )
I hope this helped! :-)