Job market for Fresh Grads is rockin! How have your kids fared?

It is a common thing for:

  1. Employer who requires A, B and desires C, D, E, F, G, H will write "required: A, B, C, D, E, F, G, H".
  2. Applicants who have any subset of A, B, C, D, E, F, G, H will apply, since they know that most "required" listings in job ads really mean "some of these are required, but the others are just nice to have".

Why can’t employers write “required: A, B; desired: C, D, E, F, G, H” to make it more clear which are required and which are just nice to have?