I think you are definitely talking about sports betting, there are selections that are of a very low value, they can be very sure and captivating enough to get a lot of gamblers attention, these are part of their schemes and traps to lure you into making the wrong choices. Playing sports betting for a long time has taught me this. Just like you said when it's too obvious then it's definitely a trap. When it seems like that selection is too sure to pick the best thing for you to do is pick something random because that might be a way to escape the mind games of the bookies.
A gambler can only fall for the trap if he doesn't look at the game twice before placing a bet. Selections that are low are considered to be less risky and they get a lot of attention, but it mostly turns out right. The only scenario where it looks a bit more of a trap is a case where the odds for a selection on a normal day were supposed to be low, but it seems higher so that it will drive so many gamblers to pick it. I got to see that last week when I was selecting games for EPL matches. But I knew it was a trap, so I left it and exactly the odd cut.
Another trap that gambling sites set for bettors is giving fantastic odds that will be way high, which will serve in a way to encourage bettors to bet with such odds, whereby in reality, the odds won't fall in good prediction. It's all a trap to make them lose their bets.
This is literally what I was explaining earlier. They give you odds that every gambler expects to be low, and they make it high to lure only greedy gamblers and also gamblers who don't pay attention to details. The gamblers who fall for this trap are those who mainly bet on live games. When a game is ongoing, they make the wining or any other events odds so high. This will entice them to stake high on it, and only luck will save them from losing the game.