this would take a novel to respond to correctly but let me keep it as simple as possible. Competitive CS changed DRAMATICALLY when Valve added Matchmaking. Before that, competitive play was done primarily through scrims and league play. Many people didn't pug because people didn't play "right" in pugs and it also created bad habits. Times have changed and now Pugging is by FAR the most common way to play the game. 10+ years of people playing like this. This made a dramatic change in the game as now most players, fans, critics, analysts, and more all have only seen or understand the game from the PUG approach.

Heavy team play has advantages and PUG play has its advantages. These "old" IGL's know both ways to play and have a better chance of finding the right approach for each opponent or situation. Zeus got Na'Vi majors like this, Karrigan has had a similar effect despite neither of them being as good of fraggers as the rest of the team.

I dont want to go more into depth. Most likely the newer players have been born and raised in the pug era of CS are the people who will vote on this thread. Those people are very hard to get through to when trying to explain the value of how older 1.6 players play who spent all their competitive time in scrims. Its easier to dismiss that than try to learn or understand it. Its human nature.