It absolutely is applicable, in order to help you craft a believable message. I think your recruiter is completely wrong. I think it hurts your application much more having a gap year, then putting a year of education on your resume. And I have assisted in the hiring process before, I would not recommend someone with a gap year over someone who got their masters (even if the master's was in underwater basketweaving!), unless there was a very good explanation for the gap year. Even when there is a good explanation for the gap year (say took off a year to take care of a dying relative), well, most people don't take off a year to take care of a dying relative, so as an employer, I would question their commitment to work. I highly recommend you put your master's on your resume. Whatever explanation you come up with for getting your master's (and ideally it would be the truth), is going to be better than explaining a gap year. Even saying that you couldn't find a job so you decided to go back to school would be better then having a gap year. But really, it shouldn't be that hard to explain a master's in education, just say that you hope to teach at your local community college some day, and that you thought it would be best to get your master's when you could solely focus on it, before getting you started working.
BUT, considering your other post, were you fired from this internship/job before or after getting your master's? That answer will help you craft the appropriate response. Omitting an internship or job is also a bad idea, better to be honest up front, then lie and get caught later.
If you were doing both at the same time (as seems to be the case, but I don't know for sure since you insist on being so obtuse), then craft a story about how you were totally unprepared for the amount of work required to do both, unfortunately you let the work at your internship slide, but you have your master's complete now and are 100% committed to focus your attention solely on your job.
I have known several pharmacists who were hired after being fired from other jobs ( ...in most of these cases, the pharmacists were just in general, bad employees, and still managed to get hired again!-in 1 case, it involved a retail pharmacist who was hired into a hospital and she had an extremely tough time adjusting to the different job responsibilities-that was exacerbated by her family situation, she easily picked up a new retail job) Jobs/Internships can be bad fits, even leaving a job before you are fired, can still get you marked as "not eligible for rehire" and make a new employer question you, so rather then lying about your employment history (of having a gap year, in which case the absolute worse will be assumed by the interviewer), its better to be upfront. You need to be honest about what the problems was, and why a new employer can be confident that they won't have that same problem with you.
I get the feeling that you don't like the answers people are giving you, but the answer you want to hear, isn't going to get you a new job.