Yes, but what if there is actually something wrong that is causing those excessive goals being scored in a short time and the bad defender ratings. It is in our advantage to report it as it might cost us later on. Like you said, as long as you are winning, in some way it is ok, but this might turn up against you soon or later.
By the way, what you said concerning substitutions in the other thread, I have noticed that too. But, it does not happen every time. The possibility is there though.