Research creates an edge towards other gamblers, but it does not guarantee sure winning, although it increases the potentials of winning. Luck is still the key element in gambling. There are a lot of good researchers out there who gamble and often end up losing, compared to those who just got luck and decide to gamble, and end up winning it all. However, taking research should still be encourage most particularly for sports betting, at least you got to reduce your chances of losing.
You can't always rely on luck alone, you can be lucky for a while, then a streak of bad luck will come. Especially if we are talking about betting, in this case there are almost always favorites, and most often bets are made on favorites, and luck in this case will only consist in whether they win the match on which we bet or lose. Bets require analysis of matches, without this you can play another game that does not require this and hope only for luck.