Did the Pittsburgh Steelers win in 1970s due to steroids?

When it is announced that the Pittsburgh Steelers intend to play, reporters seem to be responsible to write about their links with steroids. They put efforts to create a steroid scandal and to find any supposed relations of this team with it.
Mike Fish of ESPN displayed the same attitude, when the Steelers played in the 2009 Super Bowl.  Thisjournalist turned to be successful in writing news related to the Steelers and steroids.
However sportswriters do not have always success, when it comes to relations of a team or a sportsperson with performance-enhancing drugs before a competition, the situation is changed, if it is spoken about the Steelers. Reporters like writing about their history, about the lesson related to anabolic steroids that took place in 1970s.
David Fleming wrote about historical lessons of the Steelers before a game between the Pittsburgh Steelers and the Green Bay Packers. This sportswriter mentioned about time, when the NFL hadn’t yet prohibited administration of steroids. So, according to several sources, players of the Pittsburgh Steelers administrated steroids in the late 1970s. It is noticed in the 1991 book “False Glory: The Steve Courson Story” that over 70 % of the offensive linemen of the Steelers  applied steroids.
It must have been true but you have to understand that intake of steroids was not prohibited. Why are the Steelers blamed, if intake of steroids was permitted?
Jim Haslett told the New Orleans Saints that the Pittsburgh Steelers had won numerous times in 1970s and in 1980s due to steroids. According to this trainer, the players of the team became much more powerful due to steroids.
But it is important to be careful here. The Steelers were not the first football team that applied steroids and other preparations which have performance-enhancing effects. There were other professional football teams that used steroids even in well-organized manner.
Matt Chaneygave the better explanation related to intake of steroids by football players. He noticed in his book “The Spiral of Denial: Muscle Doping in American football” that the Steelers were not responsible for the steroid revolution in football. There was another team that was responsible for this factor. The San Diego Charges administrated steroids before the Pittsburgh Steelers in 1960s.  
However the Steelers used steroids in 1970s, it is impossible to consider that they won due to steroids. There were also players of other teams that administrated these preparations too. Nevertheless, the Steelers were successful!