There's been a wave of targeted ransomware attacks recently that spend time surveilling and infiltrating their targets before holding their data for ransom. If

There's been a wave of targeted ransomware attacks recently that spend time surveilling and infiltrating their targets before holding their data for ransom. If companies take your proposed approach, some of them will find their backups have been compromised and be forced to pay up by ransomware attackers. It's simply inevitable.