this is a true statement. not forever when you spend a lot of money on business, you will get bigger profits. However, most people try to do that with minimal money. when they have benefited from it, they will usually increase their investment to get a bigger return.
Personally, I have tried to make various kinds of investments. trying to spend a lot of money for more profit. however, most of them have had conflicting results. Therefore, not always spending a lot of money will give you big profits. if there are people like that, either they are lucky, or have made so many investments that they are successful