Well, there is probably a reason why nobody thought it was worth doing it again ever since.
More seriously though, just because many projects were wrongly considered foolish in the past, does not mean one can not point at a new one and call it foolish. History tends to remember those who turned out to be brilliant, and forget all those who genuinely were foolish.
The example I like is Franz Reichelt [1]. People around him were watching as he prepared to meet his death. Nobody said "don't do that, you'll kill yourself". Why? I guess because they were not sure, and they did not want to be the person who dissed someone who might be remembered as say the Wright brothers were.
I guess I'm not comfortable being the guy who says nothing as he watches people being foolish or delusional.