Customer records, financial credentials, and government-issued identifiers sit in production systems today. Some of that data triggers mandatory breach notification within 72 hours if exposed. The people handling it may not know what protections apply. The people accountable for it may not know they're accountable.
Meanwhile, sales and partnerships represent data handling practices to clients and prospects. Those representations rest on assumptions about what engineering does. No documented policy backs them up. That gap is a liability with or without a breach.