It's not weird, it's entirely accurate. Making substitutions doesn't reduce the chance of errors. Better to let those who made the errors play on.
Football isn’t as complex as you want it to sound
individual errors and a subsequent loss of confidence is a strong possibility and is seen time and time again in players within a game
subs are an option for many reasons and to attempt to change the dynamics of your team is one very good reason
I don’t think anyone claims that making subs reduces the chance of errors, what it does do is to shake things up and that is an important tool at your disposal within a game of football