I do agree that everyone looses in the long run.It does not matter of professional or immature gambler.House always win in the long run everywhere whether it is online casino or offline (physical).When two professionals compete with each other there too only one of them wins.
So what is the point people that using gambling as finance gamble if in the end they will lose it? There are many people that use gambling as their own finance to feed his family and it seems that everything run well
Some people who use gambling as their main source of income are either really skilled or really dumb. Those people who use gambling as a source of income, are usually professionals, so while they will lose they won't lose all of their finances. Gambling probably shouldn't be regarded as a source of income for the average person, as you will probably lose more than you can win.