Sure, players are allowed to make mistakes on the field...but whatever mistakes it is...DO NOT make ones that will cost the team a goal or two. Those kind of mistakes are unacceptable and will not be tolerated in any ways whatsoever--especially if the player knew what he or she should have done and didn't do it.
Mistakes that are simple and more tolerable are those that are like losing possession of the ball, not able to successfully tackle away the ball, not able to execute a successful fake or pass, not able to successfully control the ball at one's feet and so forth.
So again, most mistakes are tolerable. The ones that aren't are those that will cost the team a chance at winning due to others not using their heads. So learn how to play smarter and not harder!
