If proper effort is committed, much of what we “want” will be achieved. Now, energy expenditure of course varies quite a bit based on both the want and the abilities of the wanter, but an input = output sense of order, of fairness exists regardless of want difficultly. And even if the want is never fully satisfied, one necessarily grows closer to the coveted outcome through proper inputs; you may not lose 100lbs, but if you cook every meal, you will lose something.
There exists, however, another category of wants (titled Courageous Wants) where the input = output formula cracks. The #1 CW is love. Almost everyone contests this judgement, because by placing love in CW, one’s agency is apparently swindled, because there are no “right things,” no “proper inputs,” no “blueprints” for CW, because more effort (however defined) does not necessarily get one any closer to the want. Sure, one can seemingly tilt probabilities – going on 100 dates instead of zero – but this is mostly an illusion. In non-CW, nobody “accidentally” loses 100lbs; in CW, people routinely “accidentally” fall in love. Hence the courageousness of wanting love: you are throwing your well-being into a grinder of luck that can’t be conquered by self-will.