Why is sign language recognition system required?

I'm working on a sign language recognition project for my final year.
I have Targeted the software to be used in banks and airports so like wise the model can recognize words like "deposit", "withdrawal", "ticket" etc
I almost at the end of my project and my supervisor asked me the question
A person can just go to a bank and point at a digital board / write the word to communicate with the staffs. For example click at a …

banks deeplearning etc language project question recognition software the end wise words