No, it’s not valuable for someone to go for an MA after graduating from science. Unless you have a specific target or reason behind pursuing PG in arts it’s not recommended at all.

The course you are opting for should have a direct connection with the industry you are planning to enter. Focus on your goal and pursue the program related to that specific field.

People with no specific goals regarding the industry or profession are much more likely to come across such questions. Redefine and recognise your goals and then if it still suits you best, go for PG in arts.