You make a good point if we are accepting the premise, but from what I’ve seen it seems like there is still an open question as to whether willpower is a finite resource at all or if we just think it is and therefore act like it is. Certainly when we act like we have some kind of Will Points that we can spend, they seem to self-replenish over time spent doing non-WP-draining activities (to simplify by metaphor: my mana meter refills as long as I refrain from doing magic). But I would expect that to seem true even if the premise was false (I don’t even have a mana meter, just some kind of self-imposed limit).
You make a good point if we are accepting the premise, but from what I’ve seen it seems like there is still an open question as to whether willpower is a finite resource at all or if we just think it is and therefore act like it is. Certainly when we act like we have some kind of Will Points that we can spend, they seem to self-replenish over time spent doing non-WP-draining activities (to simplify by metaphor: my mana meter refills as long as I refrain from doing magic). But I would expect that to seem true even if the premise was false (I don’t even have a mana meter, just some kind of self-imposed limit).