Some cybersecurity practitioners just narrow-focus on the cyber aspects. It is no surprise given that the IT cyber space is mostly digital. But when we come to OT, we must have a balanced view to look at the physical side as well. Both cyber and physical aspects are equally important to secure the plant.
If the OT system is well protected at network perimeter, why bother to keep unnecessary investment on cyber protections while ignoring the physical protection? Even worst, the mentality is to untrust contractors doing work on OT system but ignoring physical security is outsourced.
We have a strong and secure OT system but a misaligned or incorrect torque in a bolt and nut might cause the same severe consequence. More competent cybersecurity practitioners or auditors are required to avoid corporate management is misinformed incurring FUD.