Truly, what sounds better – doing what other individuals need you to do, or what you need to do? There are precisely two circumstances in which you have to do what other individuals need you to do, they are called "school" and "work" and you'll know since you'll be in a class, or you'll be getting paid. In these circumstances, there is a real motivation to do stuff, thus you ought to presumably suck it up and quit playing Flappy Bird and do what your genuine supervisor is instructing you to do. In most different circumstances, the main expert other individuals have over you is the specialist you're giving them, so stop. You're responsible for your own particular life, so grasp that, instead of giving others' conclusions a chance to direct your activities.
I'm not sure I understood everything you wrote (I'm not native english speaker). Obligations are just a survival thing since everyone needs to put food on the table. But motivation relates directly to happiness, since a motivated person would do her job with a goal in life and that's basically the reason we are here right?
In school the problem is much worse, since a unmotivated child just won't learn no matter what you do. It's just a waste of time and resources torturing her. You first need to make her want to learn, thus helping her create her intrinsic motivation through external regulations.
Thinking about motivation and the way it works is therefore a matter of doing what you have to do, while being happy doing it. The point is that being paid to work or being obliged to be in class (extrinsic regulations) don't work in long-term development of intrinsic motivation, as Mr. Deci proved first in 1971. They work if you feel related, autonomous and competent doing it.
Thank you for your comment!