What's unscientific about it. It's like saying "steroids cause muscle growth".
for one they don't refer to it being a fact, but that it's been "noted" in some institutions. little like saying, "in the elderly home it is commonly believed that everything was better 30 years ago". exaggeration but you catch my drift.
... and i wasn't aware that steroids are truly addictive in the true sense of the word? i mean, are they addictive in the same way candy is addictive or say nicotine? everything can be addictive but but I don't think you'd suck dick for steroids... oh wait nevermind