Not entirely true. As someone who has been in the collegiate athletic medicine area for the last 40 years, I think I can say this fairly certain.
The strength and conditioning principles over the last 40 years are incredibly far ahead of what they were even back in 1970. This also include nutritional sciences, and athletic rehabilitation. We are working with science here, and not just "supplements and drugs". The advances you are seeing are the direct result of these scientific studies, research and hard work!