I think the sting u bc they sense u being worried. Idk one day a wasp started flying near me and instead of being anxious about being stung I thought "stung or not stung it matters not to me" an it never stun me.
Idk I've been near a ton of wasps flying even as close to like half a foot away from me and never got stung. Maybe the fear of being stung is actually what's makes u get stung. Hell this wasp got in somehow and had been trying to figure out how to leave since I can't open the windows. He's just been chilling in my room for like 6 hours now and had never even tried to sting me.