I don't really consider myself nuts or bonkers or foolish.
If I don't know what a particular weather condition is going to be like, I have two choices. Try it. Or read a book and avoid experiencing it in real life.
IMHO, the key is not to avoid altogether but to have alternatives. If you can see the other side, if you know the cloud top is only a little bit higher, if you have sea/flat land beneath you, if you saw some sunlight just up ahead, if you can turn round, you have options. If you're in a low wing aircraft, you can see if you are getting build up of snow and use one of your options. Having alternatives is more important than mindless avoidance based on something rote learned from a book.
There is no right or wrong answer to whether flying in snow is safe; it is a matter of degree. Sometimes it is not a big deal, other times it could be. As pilots, we should be evaluating the situation all the time.