Race bikes gets lots of maintenance and upgrades. Lots of disassembly and re-assembly. There's a certain amount of worn-out fasteners and lack of torque-wrench usage involved. Safety wire is 2ndary back-up for that.
My race org forbids using safety wire as primary retention for ML plates. Does allow using as backup though.
I've lost a ML clip once. Then I realised there actually 4 orientations to install clip, not just the 2 most people are familiar with. Never lost clip again after that.