i see your point Schmitt trigger, i always kind of think that too, but at the end of the day, you have a fuse there, so any short will just blow it, and all will be well again. i think that stipulation specifically concerns capacitors , because some of the old ones were flammable.
I havent seen safety rated bridge rectifiers for example.
Just saying because as we know, there are thousands and thousands of regs and its always interesting to try and clarify them. Partly because nobody can afford to buy them all to read.