This is a point worth clarifying. I think a lot of people actually do get rich investing. It just turns out the "good process" in this case is leaving your money in a diversified portfolio for decades. This leverages making a bunch of bets that on average have a positive expected value over a long enough time horizon that you are able to realize the gains.
There are also certainly other ways to have an edge in investing (quant firms come to mind), but I think the most realistic option for "anyone" is readily available in the form of low fee index funds and a long time horizon.
There are also certainly other ways to have an edge in investing (quant firms come to mind), but I think the most realistic option for "anyone" is readily available in the form of low fee index funds and a long time horizon.