Choosing an Arts subject if you are good at it and enjoy it is a great thing. Universities especially in the US love such variety, and it develops excellent skills. This is especially true of Theatre, which often students decided not to do and do another academic subject when in fact they would enjoy Theatre much more and Universities love it just as much as that supposedly "more academic" subject.
A Student Speaks
"There is a common misconception though, especially among today's generation where people believe that pursuing art is not a very stable or successful career choice.
However, I think otherwise it's actually the opposite of that. Art isn't just about becoming a professional artist. It's about cultivating that mindset, that creativity, the perseverance, the problem solving skills and the emotional intelligence that other subjects don't really provide.
These qualities are just as valuable as any other career. Moreover, art can complement other fields such as engineering by inspiring innovation and pushing boundaries of what's possible."
TEDx Talk
Fabulous TED talk that explains the key skills needed to succeed in the future, and studying the Arts is definitely one that can help grow these skills...