I wasn't sweating the preschool. There are plenty of other preschools. My kid's lot in life won't be determined by where he learns to not eat paste. But I do sometimes wonder if we're too laid-back as parents.
We live in a time when we can Google everything, share ideas and expose our children to amazing opportunities, but anyone that implies that they have it figured out is either drunk or lying (or both), so don't be too hard on yourself.