Here is an image of a rusted steel bolt so does that not show that what feel is safer may not be safe as you speculate?
Let's say I like to be rational because everything that has advantages also has disadvantages, but the so called reason for asking such question in the first place to reduce the illusion created around crypto steels.
May be everyone likes to agree to ideas but I disagree with some ideas to make sure we disagree and then agree on one thing to make a fact solid.
@m2017 you may be more experienced than I am in the forum but have you considered the person behind the name and the rank in the forum? A professor could be making a point but because his low in rank does not mean he or she doesn't know what his saying. Boiling down to the end of the matter one can by such act of disagreeing make others go to make more research and find a more safer ways to safe guiding one's BTC hence not just relaying on one proclaim solution.