Decisions in life are the same as gambling because nothing is certain, then people can only make decisions based on what they know and in fact everyone is just gambling based on what he knows.
But one thing you need to know, even if a group of people make the same decisions, but they do it based on different levels of information and knowledge which in line with what they know.
So anyway trading is better than gambling, because the direction of success is predictable and in spite of all losses it can be minimized to as small as possible.