Smart sheep?

Can a confused, frightened, rejected person make a rational decision with eternal consequences? If someone who is in that state of mind, which is most of humanity until they know they are unconditionally loved by the Father, Son and Holy Spirit, any more capable of making that kind of a decision than a child?

Traditional doctrine says everyone is born a sinner; but at least we have come up with a get out of hell free card for those under some mythical age of accountability.

I am reminded of the parable of the great shepherd; He sought out the lost sheep and rescued it. The sheep probably didn't even know it was lost. Sheep are not known for their brains and ability to properly reason and make sound decisions.