Why are they being compared? Gee, maybe because some of us are capable of doing either job.
Also, “completely no overlap in roles and responsibilities” - are you really that clueless or what company are you with that the MSL and sales jobs are truly COMPLETELY different?
I have been in oncology for over twenty years, both start up biotechs and big pharma's and there is a pretty big firewall between medical and commercial from a compliance perspective so I am not sure how you view the functionalities being similar, other than both being field based and customer facing. I have never been paid on an IC plan based on sales, so driving demand - the prime focus of a salesperson - has never been part of my roles and responsibilities. If you have had a different experience as an MSL I would return the question...what companies have you worked for? Seems a little shady if you ask me.
Perhaps you are working in something less clinical and more primary care/mass market where they have you doing something more in the gray area promotionally or perhaps you are just answering off label questions, eMIRFs, et cetera and not managing multiple clinical trials?
I have never been tasked with selling on-label or off-label in my career and I am far too busy managing the multiple clinical trials, CRO's, and IRB's, while covering congresses to be 'selling', of which I get paid no more or no less based on the success or failure of the drug commercially on a quarterly basis. I have never even seen sales numbers as an MSL!
So, I stand by my comment, based on my 20 plus years, that there is very little to no overlap between an MSL and a sales rep. and it is foolish to discuss which one has more job security. The answer is "it depends on a multitude of variables and what company and TA you are working in". For instance I would hate to be an HIV MSL now versus back in the 90's early 2000's when all the clinical trials were happening. Those MSL teams have been slashed over the last 15 years.
Lastly I will agree that sure "some" of us may be qualified to do both jobs(i have done both) if you have a terminal degree in a life/health science you could be qualified to be an MSL. Having a terminal degree, however, does not automatically qualify you to be a salesperson. There are other core competencies outside of clinical acumen that are needed to be a successful salesperson. So if you are from the medical side, as I am, I would ask that you check your arrogance at the door as I have seen plenty of brilliant scientist go into commercial and fail miserably. To say we can easily do their job is a false narrative, and arrogant one at that.