Not obviously wrong, and not always wrong. For instance, a very small business might not operate its own bank account, and the owner's personal accounts might be used for both private and business purposes. In that case you would not show personal transactions in the business records.
But a bank reconciliation would involve going over the bank statement line by line, identifying each transaction as personal or business (or even mixed). Only the business (and the business parts of mixed) transactions would feature in the business records. Furthermore, any drawings or introductions of capital might not even involve any actual bank transactions at all, but would nevertheless need to feature in the business records.
"Obviously" it is preferable, when a business does operate its own bank accounts, not to put personal transactions through them, but where that's unavoidable, they ought to feature appropriately in the business records, probably as drawings/introductions or in the case of companies as director's loans.
I hope you're not saying you would simply compare totals (and identify which of your pending transactions are responsible for any disagreement). Any proper bank reconciliation should involve matching *every* bank statement entry to one or more transactions in your accounts.