I would say it depends but the truth is all gambling games still have a percentage of its possible win or loss dedicated to luck.when we make gambling stakes, we hope on winning but the truth is there is always a chance of losing. Aside the fact that all gambling games still require a fraction of luck , they don't all depend equally on luck. Some include things like experience, statistics and even proper analysis which some are just fully luck based.
Take soccer predictions for example with statistics and analysis you can raise your winning odds higher making luck to be more on your side.
Gambling isn't all about luck because as a gambler, you must learn how to be efficiently strategic in your gambling activities in other to increase your chances of winning your stakes but we must also not shy away from the fact that the result of ones gambling is mostly affected by how lucky he can be in his gambles.
For instance, there was this particular form gambling that requires anyone who wants to gamble on it to be well experienced in it as well as to be very strategic in other to be able to win it. But there was a day someone who haven't engaged in it before joined us to gamble and ended up winning more than any other person including the most experienced and strategic of us all. That was the day I came to terms with the fact that gambling requires more of luck than experience to get winnings.
Gambling requires luck, but not all the time. As you said some new gamblers can win big right in front of other experienced gamblers who are struggling for a win. However, analysis work fine, but not always. Those who predict games using different form of analyzing tools or research, still end up losing. But, since a lucky person can't keep on winning, with his truckload of lucks, then gambling has no certain criterion for winning. A lucky person can be struggling to get a win. So, it's not a thing to bother about whether one requires luck or not. With the luck the win is not guaranteed. To win, one needs to be steadfast, and know his ways around the game he loves playing. Given time he'd win and make some profits. It also requires timing, if the gambler is good at knowing the way the machine works, he can take advantage of it. That's for the offline casino.