Is it not a pharmacists job to fill and dispense prescriptions given to their customers by their doctors?
If a pharmacists employer allows them to refuse to fill certain prescriptions because it violates their religious beliefs, that is fine. No problem. But if the pharmacists employer does not allow this, then the pharmacist has two choices. Fill the prescriptions or quit.
And in this case as it has been noted several times, it is not Walgreens that makes them fill the prescriptions, it is state law. So the pharmacists have 3 options. Fill the prescriptions, quit, or get the law changed.
If a doctor wants to kill a customer and and gives a prescription that requires the pharmacist to dispense a large dose of potassium cyanide, the pharmacist has a professional responsibility not to help murder them.
Do you want argue the contrary?
I'll note parenthetically that "job description" and "professional responsibility" are not synonyms.
Option 3,"Getting the law changed" sounds good, in the long run.
Otherwise laws could be passed that insist all obstetricians perform abortions when asked to do so.