Just because something is possible doesn't mean that it is likely, it is possible for me to become the richest person in the world, can you say it is "impossible", of course not, it is not impossible but lets be real for a second and realize that I won't be, same for these futures as well, people who put up just few hundred turning that into tens of thousands and then turning those into maybe even millions.
We need to be able to filter any information through the prism of your capabilities, a trader who was able to make x10 or x100 on trading did not learn this in one day, he probably spent many years on this and also lost a lot of money before that in an attempt to achieve a good result. And probably they will not want to show us all the unsuccessful attempts when they lost money, they will only show us the attempt that became successful for them.