head in the clouds
adjective Impractical, aloof, or fanciful to the point of being very unhelpful or counterproductive. That sort of head in the clouds thinking is not getting us any closer to a workable solution.
head in the clouds, to have one's
Daydreaming, absentminded. In the clouds has been used figuratively to mean obscure or fanciful since the mid-seventeenth century. It was not until relatively recent times that a vague, dreamy person was said to have his or her head in the clouds. See also on cloud nine.