I think you are over estimating how smart someone has to be to pull something like that off and under estimating how gullible majority of population is. WEF has been working on this behind the scenes for decades and only now we start to see the effects when all the Young Leaders become Prime Ministers and furnish their cabinets with their fellow WEF members set with the common mission, and now the "once in a lifetime opportunity to change the world" has appeared. Probably the fact that Klaus Schwab is old and wants to see the Grand Finale (or Great Reset if you will) before he goes also plays a part.
Other factor is that they themselves may not be competent, but they have money that can buy competent people to get their closer to their goals, however, stupid and destructive these may be.