These young men see steroids as the solution. Weight training, working out, and wanting to build a healthy, strong body are good things. Steroid users put themselves at risk in pursuit of their goal. For the most part, young men want this look because they want to feel better about themselves. They think bigger muscles will mean more respect from their peers and more admiration from others.
Anabolic steroids increase muscle size and therefore help to increase strength.
That's why steroids are so appealing to young men. Regular exercise alone will help to increase strength, but steroids give muscles the potential to grow stronger and bigger more quickly. But there's no magic to steroids. They will not automatically provide young men with the look they want. Few young men can build the type of body seen in ads and videos.