I'm sorry you are incapable of integrating new information into your views. Starting from the late 80's, 90's and 00's kids have been trained from 3-4 years old to be professional hockey players (as well as many other niche sports). Development and skills camps every winter and summer, skating coaches, travel leagues, etc. There were no development teams for guys growing up in the 60's and 70's. If you think even a single third liner from the 80's could make the NHL now I don't know what to say.
There were—and are—many great NHL players who stand out above all. The heroes of my childhood have come and past and left us with many memorable moments...
bleacherreport.com
This article was written 15 years ago and already had noticed the huge gap in play between the 80's and 00's.
USA hockey has standardized development progression now, in the past the only way to really grow into an NHL player and gain inside knowledge was to know or go to an NHL/ex player who ran camps. Hockey drills were not universal between different leagues and parts of Canada even in the early 90's.
Learn how properly teaching the skill of checking through progression can create quality scoring opportunities, help a team regain control of the puck and enhance a player's enjoyment of hockey.
www.hockeycanada.ca
Canada similarly has developed programs that didn't exist when guys who played in the 80's were growing up. They didn't have the same skills development, and the fact that the fastest skaters of the time would be dealing with many subpar skaters meant those fast guys didn't need to push themselves to get better.
The irony is in the Olympics modern athletes absolutely gap and destroy any athlete from the 80's in every single metric of nearly every single event, but you somehow think hockey players are immune. We're talking the 15th place finish in any Olympic event now would medal in the 80's. In speed skating, nearly every single world record is from the past 10 years.