Answer:
"Shielding our children from [mistakes] by striving for perfection in our own parenting does them no favors."
Step-by-step explanation:
This is the sentence that best expresses the author's claim. In these lines, the author tells us that parenting is extremely difficult and extremely demanding. Because of this, we should not put too much pressure on ourselves as parents. Striving for perfection shields our children from our mistakes and does not give them the chance to learn from our shortcomings. It is better to try to do our best, but be aware that even when making mistakes, our kids are learning something and building character.