You are correct in that… however I think that this harkens back to "talk is cheap, actions lead." That is, it is very easy to say "this is safe" even if you don

You are correct in that… however I think that this harkens back to "talk is cheap, actions lead." That is, it is very easy to say "this is safe" even if you don't think that it is. By putting something that you value on the line, then you are showing your level of commitment to the statement that "this is safe". I think that you will find it is not the "technical experts" who were afraid, but the workers in the building. This is exactly the sort of action that reassures these people, since they see that you have "skin in the game". It is also worth noting that he almost certainly didn't believe that he was placing his wife and child in danger.