To get profit from gambling you have to take a lot of risk because even then you may lose more. Gambling with small amount of money is more harmful because if you lose all money from gambling then it will be difficult to manage your life. So with more capital you can live life with some money as backup even after loss. Moreover gambling depends more on luck because there are many people who gamble millions of rupees and do not get any profit. Again there are some number of gamblers who become rich by gambling with little money.
Having more capital will give you much risk when you already exposed to gambling since you have the tendency to deposit ore in case you feel the urge to chase lose which is common for gambling player.
The advantage of having low capital despite the profitability is very slow is you have control risk. Remember that high roller tends to lose more since they are risking more. Having huge backup money doesn’t mean that people can accept lose easily and move on since they will not resort to gambling if they don’t like fast profit which is the commonly reason of chasing losses.