What happens is that if we consider the series of betting every week for many years and several bets, it's more likely that you'll win than someone who is betting for the first time.
Bit what about people that tried it for years and still not win at all? Although, tii are right that the chance the person would win a lottery would win may be high but still it is possible that the person may not win at all. I see lotteries as more way people lose money although gambling generally is very dangerous. I have seen someone that tried lottery until he was tired. I have not tried it before and I will not try it. I prefer trip just waste my money instead on gambling or betting.