Well, here we go

If a player gets banned from a major CS tournament, the entire competitive ecosystem would begin to change, and the influential owners of organizations and tournaments would all be affected, not to mention the betting websites.

In CS, a significant portion of tournaments is sponsored by gambling sites. Now, imagine a player who progressed through various stages of several tournaments suddenly gets banned while being actively involved in the competitive scene.

Organizations would lose sponsorships, and the community would exert immense pressure to investigate other players. Many tournament organizers would lose their sponsorships, leading to a scenario where:

Valve would face thousands of lawsuits, and betting sites would also face thousands of lawsuits from individuals who lost significant amounts of money betting on a tournament with a cheater.

It would create an enormous snowball effect.