Mate you cannot call it 99% luck. It is 99% luck if you blindly keep gambling. If you use strategies and try to get better of the odds then you can win. Thats how I bet(Sports). I look at the odds given and try to take advantage of the odds given.I lose some but I win a lot more than that. I was planing to write a book about it and how to take advantage of the bookmakers odds but its a really hard sell and a lot of explaining to do which i am not interested in at the moment(too lazy). probably in the future once I have made enough to retire from my job early I will write a book about it.
First of all if we talk about probability gambling(dice etc.) it is gonna be false that we state about strategy. Each bet is their own and strategy is just something which lets you go bankrupt later. But if you go bankrupt later it's pretty usual that you get damaged by house edge.
When we are going to talk about sports it does not have a stabilized probability. Here speaks your knowledge. If you can beat house with your knowledge with spotting good rates, you can have a kinda advantage. Here you can use strategies to keep your advantage profiting from the 'house edge', which pays you. If you can create such a advantage, now it is time for strategy to make it more secure