Each of us is allotted precisely the amount of time we need to fulfill our mission. Part of that time will be for studying, teaching, and helping others. Part of that time will be necessary to earn a living, which is also a divine and meaningful task.
But none of us can justify our obsession with earning a living by claiming it leaves no time for studying or teaching. This is nothing more than a misappropriation of funds: spending all the time allotted to you on one task, at the expense of your primary purpose in life.