If she suffered from an obsessive compulsion to review her case-notes in her head all waking hours, which made her into a better lawyer, we'd never even hear of this.

Other useful forms of this "insanity" may be seen in engineers, scientists, writers...

So UTILITY is definitely already the basis for any further judgment or antidote. We can say that.

So taking the hairdryer with you is already entirely appropriate.

An ideal of sanity is not our aim here. Never was. Never should be (unless that's your own personal thing).