I have a dance class booked 15mins drive away. I have paid for it in advance and really want to go. There is pretty continuous rumbling thunder outside and occasional lightning. Would it be foolish to go out in the car? I live quite rurally, but not on the top of a hill or open plane.
YABU - it is genuinely dangerous and no sensible person would do it - stay at home.
YANBU - there is a small risk, but a reasonable one to take- go to the class.