Not sure why you felt the need to throw in a random insult there but I'm sure you already know the answer to the difference between making something voluntarily and involuntarily.
Apologies, I intended the oxygen bit as a flippant joke but I can see how that could come across as an insult instead.
As to the difference between voluntary and involuntary, the grey line between those is exactly my point. The employee 'voluntarily' wears blue jackets and could certainly not wear one, and risk getting fired, and certainly could quit that job. A student certainly could spend far more time than their peers on study and end up with a lesser grade on their work, with presumably less returns in most cases. I see a lot of parallels between a teenage student navigating complex new social relationships and learning their way through middle and high school and an employee trying to just earn enough money for rent, in terms of both of them having to make 'choices' that do not feel from the inside like decisions they make freely and that have consequences that appear life-ruining to not take (in which case it reveals a preference for not having your life ruined, rather than for whatever it is that you decided to wear or use or do to merely keep up with the perceived requirements).