I think there's been some confusion in people's minds between vocation and profession. Your profession is not the same as your vocation. Profession is the means by which you earn your bread by the sweat of your brow. Vocation is an activity you should develop because you are capable of it, and no one else is capable of doing it under your circumstances.
Of course, by chance, it may happen that in your profession you can fulfill your vocation, but that's merely a coincidence.
Allow me to discern the author's vocation in the situation described. The author showed himself to be the only one able to empathize in the moment of his colleague's suffering. He could have turned his sensitivity into strength and made his colleague's life better by helping her in her time of mourning. I believe that would have given much more meaning to his life than the modus operandi of his work routine. Sensitivity was his vocation, not his routine at the pharmacy.
Of course, by chance, it may happen that in your profession you can fulfill your vocation, but that's merely a coincidence.
Allow me to discern the author's vocation in the situation described. The author showed himself to be the only one able to empathize in the moment of his colleague's suffering. He could have turned his sensitivity into strength and made his colleague's life better by helping her in her time of mourning. I believe that would have given much more meaning to his life than the modus operandi of his work routine. Sensitivity was his vocation, not his routine at the pharmacy.