Lessons repeatedly learnt and forgotten - how many times have aircraft on airfields and carriers been hit by weapons being armed and serviced whilst pointing directly at them? Wasn’t that what sight lines were established pointing out at sea or empty land?
Bad enough in the days when aircraft were lined up on pans in front of hangars. In the days of airfields where aircraft are kept in HAS on sites purposely designed to prevent fratricide it’s unforgivable.
The person responsible isnt the technician - the system is designed to cope with that. It’s all those in the chain above him/her who have, apparently, disregarded every safety precaution in place to prevent exactly such an event.
One hopes the individual wont become a scapegoat.