"Wondering why it's hot" doesn't necessarily imply "worrying whether whatever makes it hot could be dangerous".
If you didn't know that radioactivity can cause heat, and you found a magic hot rock, do you think you'd go "I don't understand this, must be dangerous" or "I have now clue how this thing works but it's really useful, I'm gonna keep that thing"?
If you didn't know that radioactivity can cause heat, and you found a magic hot rock, do you think you'd go "I don't understand this, must be dangerous" or "I have now clue how this thing works but it's really useful, I'm gonna keep that thing"?