If you are experienced or not doesn't matter. In gambling you have to depend on luck. If you are lucky then you can win a big jackpot. If you are experienced all you can do is to be a bit more cautious. So I believe everyone can do gambling but it would be better if they take it as a fun. It is true that you can win occasional jackpot but it is not to be taken as a source of income.
Inasmuch as luck and chance plays a very vital role in gambling, it doesn't mean that's all you need to be a gambler, yeah it's true that at some point in the beginning of every gambler's gambling life, they depended mostly on luck but gradually gained knowledge and experience as they advance. But it wouldn't be completely true to say that luck is all a gambler needs to succeed in gambling.
Besides there are games that need less luck and more knowledge and experience, such as card games like poker or blackjack, your success depends on how knowledgeable you are in that game and what level of skill and experience you've managed to gather in the long run.