Exactly, so many people saying oh this project will fail or that project will be a huge succes it's so obvious etc.

But honestly, if it's so obvious why would they state it? Who wants to actively be captain obvious all the time?
If it's not so obvious and they are stating it, than they are just guessing, to what end who knows (personal gain/investment or perhaps just so they could say "I was right" if they do turn out to be right) but even then, saying something that is like 50% likely to happen and then it happens doesn't make you smart/clever/able to look ahead. It just means you won one specific coinflip, yet again, your speculations aren't valued by anyone, so I don't know why these people post stuff like that all the time. It's predominant on this forum however and the main reason why I don't post more, too much junk posts to go trough.