Requirement for a bachelor's degree is a legal way to disriminate against 'those people' - less educated, poor people - deplorables.
Without a graduate degree, a bachelor's degree is just a foot in the door to the HR office so your resume can be put in the 'circular file'.
Who can't afford to waste tens of thousand of dollars and four years to be told that the job you want now requires a Master's Degree?
Would you like fries with that?