In a family, what the eldest child does often sets the standard for each that follow. This is more so true with career and education. Seeing the eldest one talk about markets, finance and economics may get the younger ones curious about the matter. Thereby causing them to pursue similar fields if not the exact same industry.
As said by Saj on 191114 -
"The goal of the MR is not to just generate prescription, it is to get into the mind of the doctors"
I take it a step further in saying,
The Moto of the MR is to generate prescription
The Mission of the MR is to become a part of the minds of the doctors