There are event you can predict on that even though it's not 💯 guaranteed that you're going to win, a level of certainty makes you think that you're surely going to win.
The downside of that feeling is that you might become over confident to use a big amount in the game since you're to a large extent certain that you're going to win.
Can we still say we are gambling if the event is something we are at least 90% sure that we are going to win?
Is there anything like that exist? because there's no one will run a business if they give 90% chances of winning for their gamblers.
But I think that that of set up can still be called as gambling. Since even if you stated that they have great chance to win there are still 10% that can change their current situation and make them a loser. This is provably the dream situation of the gambler since for sure there are lots of people there are tired to have 50% chance or lower to win on the games of chance they playing.