Whats Best for a Child is always Necessary for the Child. Most at times, when humans are being stretch beyond the comfort of their life, Habit or Character, it always feels hurtful but then necessary.  This is not just applicable to children but also to adults and ourselves. now in the case of Children, we are given an advantage from God, Culture and Nature to be able to command the obedience of Children and so caution and diligence must be applied to discharge such duty.

Bible says something remarkable that "foolishness abounds in the bosom of a Child and it takes the Rod to Bring them out". 

The rod here does not necessarily mean a wiping cane but also hard measures. It means a more forceful approach of either restrain or permission. we must at different time forceful get younger minds to behave in certain ways so that as they grow that adopt such character or trait as part of their life.

One other illustration to buttress this point is that Just as in sculpting, it takes chiseling out of parts of an object like wood before the beauty in the mind of the sculptor is seen.  Also same scenario is applicable to Molding and object out of Clay, the sculptor still has to chop of some parts and add some parts to bring out the beauty he bears in his mind.

The crux of the matter now is that no matter the line of action we are taking to discharge our parental or guidance responsibilities, we must not do it to satisfy our easy but must put the interest of this young ones in mind else risk causing damage rather than Good.