What does reconciliation actually involve?
Reconciling means proving that every line on your bank statement is accounted for in your books, and that every entry in your books actually happened. It is the check that makes the rest of the accounts trustworthy.
Done manually it is a weekly hour of matching a payment to an invoice, deciding what an unexplained card transaction was, and hoping you remember. Done by software it happens overnight, and you see only the handful of items that genuinely need a person.