Comment by cortesoft

> For example, as you said, you can have games with randoms without an automatic ranking of all players

Good skill matching is one of the most important advancement in gaming over the last few decades. Being able to consistently play against people who are fair competition for you makes the games so much more fun, especially if you are much better or much worse than the average player. In the old days, you could alternate between opponents that were no challenge at all and opponents you would have no chance against; both types of games get old really fast.

In some ways, good skill matching can alleviate the harm cheaters do; if the cheating makes them way better than everyone else, then good matchmaking should start to match them up only against other cheaters. In many ways, this is the ideal scenario - cheaters play against each other, and everyone else plays against people who are close in skill level.