In fact, nothing can be said for sure in sports betting, because we often see many unexpected events in sports betting. Sometimes strong teams lose to weak teams, so how can you gamble with certainty?
You did a lot of research, studied all the previous performances of each player from the team and picked a very strong team and a weak team on the opposite side. You bet on a strong team, but unexpectedly in the match, the weak team wins the match due to its good performance and you lose the bet, in this case, who will you blame? No one, because the possibility of the strong team winning was always high before the match started, but they did not perform well in the match and lost the match. So there is nothing to be done in this case, Because at the beginning we see who is more likely to win, We usually choose them.
Actually, luck is also very important in this type of betting. Experience can give you some chance of winning, but it can never guarantee for win.
Absolutely it is correct that there nothing can be said which team/match/bet will be winner or not but in sportsbook who has good skill usually can be winner on sportsbook which is not possible for the casino games whether the gambler is a skilled person or not as the gamble in casino is not based on skill but the based on luck.
No assurance or any guarantee that the team will win it's still depending from how lucky you are, though there's edge knowing the the team or the player that you are betting with, you can use their past performance to be a basis whether they can overrun their opponents, everything will be depending to the outcome of the game or session that you involve yourself, if you are lucky then you'll win if not then even you research deeply if not for you then you'll suffer still.