Alright, most of us have been on the internet reading about Jeep shit and problems for a very long time. If there was an incident rate of this happening at Tom Wood's shop higher than this single incident, it would be out there for all to see and it just isn't. Shit happens, I guarantee you that they are discussing it, asking those involved to be more vigilant, and the chances of it happening again are so miniscule that it is a non issue and certainly not enough of one for them to change how they do things other than to check closer for an orphan needle where it doesn't belong.
Swapping caps for painting takes seconds and costs zero after the first set of caps. Masking tape costs money, time is 2-3 minutes per end to apply and remove. Caps make sense then, now, and tomorrow.