There is way more to learn from failure of complex projects than just defaulting to 'this is a stupid idea, it can never work'.
Absolutely, but I haven't watched any debunking videos that default to that. (I'm sure there are those, too, but I don't watch them; they've no value to me.) In particular, in every debunking video Dave explains the better approach/solution. I like that.
Whenever someone says "This is a stupid idea, it can never work", I immediately ask
Why? followed by
What do you suggest as an alternative, then?, because
those are the interesting and useful things about debunking. I assume that is what every self-respecting engineer and scientist does, too. Opinions are worthless, only the reasoning behind those opinions is interesting because the reasoning can be evaluated and compared, opinions cannot.
I mean, anyone can point out details in every single human project that are stupid. Sometimes those are necessary, because the alternatives are even more stupid, and without that stupid bit the really useful smart bits cannot be done at all. Therefore, pointing out something stupid is utterly useless, unless you have a better alternative to offer.
I personally also accept the first time anything is tried to be found utterly stupid, and not blame anyone; that happens. It is
repeating the same thing over and over again, expecting different results
this time, that I object and consider waste of money. For example, every supposedly-Green trial project seems to need to be repeated in every country, preferably over and over again, in as many municipalities as possible, everyone starting from the same point, instead of looking back at previous trials and learning from them. To me, that is either literally insane, or unnecessary waste of money that allows the project funders to grandstand in public collecting cookie points how progressive and pro-environment they are, completely ignoring the actual value of the projects' results. Because face it, typical politicians aren't engineers or scientists and usually do not grasp the details of these things, so easily slide to "I'll do what seems best for me" because there is no opposing pressure, and "best for me" is the normal, healthy default human behaviour.
You'll understand what I mean, if you ever get to play with other people's money with nothing but your own conscience as a pushback.