Why is Sherlock Holmes a Cocaine Junky?

We learn about Holmes' use of drugs in the very first story - A Study in Scarlet. Dr Watson comments:

" . . . for days on end he would lie upon the sofa in the sitting-room, hardly uttering a word or moving a muscle from morning to night. On these occasions I have noticed such a dreamy, vacant expression in his eyes, that I might have suspected him of being addicted to the use of some narcotic, had not the temperance and cleanliness of his whole life forbidden such a notion."

The Sign of Four opens with another disturbing scene:

'Sherlock Holmes took his bottle from the corner of the mantel-piece and his hypodermic syringe from its neat morocco case.   With his long, white, nervous fingers he adjusted the delicate needle, and rolled back his left shirt-cuff. For some little time his eyes rested thoughtfully upon the sinewy forearm and wrist all dotted and scarred with innumerable puncture-marks.  Finally he thrust the sharp point home, pressed down the tiny piston, and sank back into the velvet-lined arm-chair with a long sigh of satisfaction.'

When Watson asks what he is taking Holmes replies:

"It is cocaine," he said, "a seven-per-cent solution.  Would you care to try it?"

It later on emerges that Holmes uses cocaine because he is bored. When he has no cases to solve, when there is 'nothing of interest' in the newspapers, and when 'the monotony of existence' preys on him he reaches for the syringe. He has no lovers, no friends and no real interests other than detective work. But there is more. He lives only for the intellect and has no connection with his own emotions. In fact he seems to have had a mild form of Attention Deficit Disorder - his mind '...like a racing engine tearing itself to pieces because it is not connected up...', his energy moving from extremes of lethargy to extremes of hyperactivity.

As everyone knows, Sherlock Holmes is meant to be a genius, who claims to solve cases through 'scientific' investigation and deductive logic. In fact, most of his cases are solved through intuition, imagination and by empathising with the criminal mind.

It is because he denies the power of emotion and because he is stuck in his head that Sherlock Holmes becomes a junky. When you have no outlet for your passion, Bodymind sends up the boredom signal to tell you to go and get a life. And one thing I have noticed about junkies is that they don't do boredom very well.

Isn't it time we stopped using characters like Sherlock Holmes, Einstein and Freud as role models, and over-developing the intellect in our children? What do you think?