Im a guy with long hair and my employer says I may have to cut it- anyone ever deal with this issue?

My hair is above my shoulders, and I got a job at the airport - the recruiter says that I will have to cut my hair as it cannot touch my shoulders - anyone ever deal with this issue at work - did you have to cut your hair , its not even that long, and why is it ok for women to have long hair tied up neatly and not men? I dont understand.