Do people want to be hungry?
"Tom goes to the store for cookies."
By itself, it is a description of an event. A picture painted.
If we add "want" in front of it (assign), we have added a motive for the event. Painted a bit more into the picture.
We could add other motives for the event: Tom was hungry; Tom ran out of cookies at home; Tom's mom is coming to visit and she's a huge cookie fan. Now the picture is bigger. Never quite complete.
"Want" serves the same purpose, and adds no more or less additional information to "Tom" as any of the other motives that we assigned, or could assign. Not only that, but just as we could add "want" in front of anything and it fits, we can add any of the other motives in front and they would fit just as well.
Being hungry, running out of cokkies at home, tom's mom coming to visit while she is a huge fan of cookies, all these motives require a single one to have importance in a choice. This motive is called 'wants'.
Even if Tom's hungry, why would he eat if he didn't want to?
It is because he wants to eat that he is able to choose to eat. To satisfy his want.
If the 'want' wasn't present he would have no reason to eat.
Even if he ran out of cookies, why would he buy more?
This only makes sense if he wants more cookies.
Even if Tom's mom is coming to visit him and she is a huge cookie fan, why would he buy cookies for her unless he wanted to make her happy ( or any other reason related to his want )?
All motives are only important for us if they are related to our 'wants'. Otherwise they become irrelevant.
A, B, C, D and so on, are different states of affairs, and they can only be motives to our choices if they are desired. A human being that tries to select between options without using his 'want' is left in the same situation as a machine that is given the task to choose between two objects without being able to do so neither randomly nor by any set parameter. The machine will last through eternity without being able to choose between any, always stuck in matter of which option it is going to take. That is, if it was even possible for the machine to start pondering over its options without first being compelled to do so.