I disagree that the two can be measured as to which is "more honourable!" Both as far as I am concerned are deplorable acts.
If one makes a decision to kill/murder their own body by engaging in prostitution, that is their choice! And may I add here - poverty is no excuse!!
However if they make the ultimate decision to murder/kill another person who is going about their normal business (be it in a bank, classroom, marker stall etc), in order to steal from them, not only have they taken an innocent life, they have also deprived a family (through the act of robbery) of a father, mother, sister, brother, uncle, aunt and/or grandparent! One does not have to be armed on all occasions to commit robbery - people have to be known to die from heart attacks after being waylaid by unarmed robbers.
As for the "lady" who said her wish was to join the Nigeria police force after graduation, I do not think they need you. They have enough armed robbers, rapists, fraudsters, kidnappers, extortionists in the police force already! She should try opening a PLC church!!!!!!!!!!!!!!!!
You've captioned all i had in mind