I feel most people want to 'become' someone. Someone better, stronger, more likeable, happier, smarter, funnier, calmer etc.
We hold such high expectations of ourself to be this amazing perfect being and we dream of the day we finally transform into that beutiful butterfly.
Unfortunately, this comes at the price of non self acceptance. Because we hold this image of a future 'me' where we feel we would be happy, we squander any chances of accepting who we currently are thereby ruining our experience of contentment and peace.
Our current image of 'me' or self is pretty unrealistic which is why self confidence is shaky and unbalnaced. It doesnt fit in with how we want to be so we cannot accept it but this is crucial in developing confidence in our self. For we must accept what we can and cannot do and be happy with it, else we always face not being good enough or living up to how we 'think' we should be.
Daydreaming like this is based on desire. Essentially a desire to be happy. But to be happy we must accept our current capabilities. When we find this level of self acceptance it doesnt matter how we act or what we can do, we stop judging ourself and just relax. Then we naturally find this imagined perfect us is nothing more than just accepting ourself right now.