A good coach should know from practice what to expect from his pitchers. If he knows a certain pitcher has control issues he may tell her that she's going 2 innings this game just to get her confidence up and then take baby steps until she's able to improve on her control. Unfortunately, there are some coaches out there that want results now.
If we are talking about a competitive travel team then a pitcher should be at the top of her game and know that walking batters will get her pulled. If we are referring to city and rec league then every chance should be given to a pitcher to gain confidence to move to the next level by allowing her to pitch out of tough situations. A coach can call time and run out to the mound every so often to get the pitcher refocused and go over some mechanics issues that are preventing her from hitting her spots.
If we are talking about a competitive travel team then a pitcher should be at the top of her game and know that walking batters will get her pulled. If we are referring to city and rec league then every chance should be given to a pitcher to gain confidence to move to the next level by allowing her to pitch out of tough situations. A coach can call time and run out to the mound every so often to get the pitcher refocused and go over some mechanics issues that are preventing her from hitting her spots.