What do you mean by this?
Outside motivation… to get my brain and body used to things… like
- Getting used to cities & crowds because I’m moving to a city
- Getting used to brief purposeful encounters (PTA, sports teams, cocktail parties, church, whatever)… because I want something that involves those brief purposeful encounters
- Volunteer hours… to make my application competitive
- Volunteer hours… because this is something I would pay to do, otherwise
- Volunteer hours… because this is something I care about, and want skin in the game, but either do NOT want to work in the field, or am getting used to being in a field I want to work in, later.
I can practice people-ing, being social, being reliable, building networks, etc. across an almost infinite number of ways. So? WHY choose ABC? The more outside motivations I have? The more likely I am to adapt, and adapt well.
I try to practice ‘rampant hedonism’

(my nickname for doing something purely for the joy of it) in my daily life, but MOST things? I need at least a couple/few reasons to do anything. From the most basic things (like taking a shower in the morning or eating), to advanced & complicated things like relationships & employment.
The more outside sources of motivation I have? The more likely I am to continue on with a thing, when one or more of those motivations have hit the alarm and pulled the covers over, or have been disillusioned/irritated, or are simply no longer present. Safety nets. So that the days I just don’t wanna, I still get out of bed; and the days I’m pissed off or disappointed I suck it up; and when the time comes I no longer “need” this thing? I still do it, because my motivation isn’t solely about what I need/want. Or? It might be. This might be a stepping stone. Many many many variables. The more motivations I have to do a thing? The more likely they are to happen.