No, those are just the examples I used to make the point that in some cases those discoveries are real and do transform our world. It would be pointless to show that there are also cases where that wasn't true because it is boringly obvious. Speculation, by nature will sometimes be wrong. But sometimes it will be on the money and the people that were stuck in default skepticism until there is ironclad proof are simply resorting to unfounded speculation themselves, some proof is better than none, and we seem to have at least some proof. Science is always going to be at risk of its theories and purported discoveries not panning out, whether it is bicycle mechanics, highly educated people or Einstein himself. And in all of those cases there were things they said or did that didn't work out. And in all of those cases they did amazing stuff that transformed our world as well. I for one would rather be cheerleading them then to be cheerleading the skeptics, because if we all were that skeptical we'd still be living in caves and hitting each other over the head with clubs for scraps of meat.

Progress, and working on progress is inherently risky. But by the time actual progress seems to have arrived speculation on how true it is and what the impact will be if it is true is perfectly valid and those that would rather engage in shouting everything down are technically off topic and I personally find it annoying. Not quite as annoying as crank science but still.

On that subject: there is still a non-zero chance this is a hoax but that chance is rapidly diminishing, there is a very large chance that this whole discovery will not be immediately practical and that it will still take a ton of work and funding to unlock its true potential. The skeptic would rather not spend that money and would rather avoid the work, it's a cop-out, and a cheap and easy one at that, and it's exactly why the skeptics have the better track record: progress is hard. But not impossible so let's see what comes out but let's not give up hope that progress is still possible, especially not when it seems that progress is being made.

My initial skepticism was high (this isn't the first room temperature superconductor claim), then as I read the paper and checked some stuff my conclusion was that this could be the real thing but the numbers are such that it isn't a practical superconductor just yet. That confidence has since gone up a bit but I still would not bet that this material as discovered right now has huge industrial applications. But if it is true then I am somewhat optimistic that it opens the door to lots of new research and that research may well pay off (or not, time will tell).