For some reason, my friend believes that the format of the World Chess Championship is made in such a way with the purpose of increasing the amount of errors by the players. Is there any trutto this claim, and why?
The change in time controls from the 2018 match (which had an increment from move 1) to the 2021 match (no increment until move 60) is widely acknowledged as having the goal of increasing the likelihood of time trouble and hence mistakes. This is exactly what happened in game 6, and Magnus acknowledged this point in the press conference.
Some people have also suggested that the decrease in rest days was also intended to make the players more likely to make errors. This is less clear-cut, because the increase in number of games is also a good reason to have fewer rest days.