gambling is like business where people look to make more money from investing little money but most of them will get failed.
Gambling is nothing close to investment man, Your quote is fully wrong. In "investment" you're using analysis to calculate will this investment be successful or not, and the influence of probability is significantly low. And vice versa with gambling, where house of edge and EV is always negative. The only way to invest in gambling is to open your own casino
There is other investment option which is you can invest in the house that way you can become investors and not a gamblers if you will not play .
There are just people that thinking that investment that
double yourr money is a real deal investment and since gambling also give the same opportunity to double their money they think it is the same.