You are perfectly correct - discrimination on the basis of age is ILLEGAL in this country.
Reminds me of the
Deborah Wardley case in the 80's where she took Ansett to court over discrimination of sex. May be you old timers can do the same and set a precedence for older pilots who meet the usual airline entry requirements as Deborah did as a female pilot in the 80's? But no doubt the airlines will come up with some ridiculous counter claim, like walking sticks in the cockpit is a safety issue in moderate turbulence?