How many injuries and/or deaths are caused by car crashes in a year? And how many by people eating their own heart? OK, so, now you've got a billion pounds to spend on a marketing campaign, are you going to target driving or heart-eating?
Blame BBC for an ambiguous headline.
The conclusion of the study should be that the government should spend more effort fighting alcoholism than LSD abuse. Most likely, it already does. The conclusion should not be that young people should start experimenting with LSD instead of alcohol.