According to the article you posted;
- Bingo??
- Craps??
- Roulette??
- Lottery??
- Video Poker??
~ Black Jack's game is also based solely on luck, we don't know what our opponent's cards are, so it's not even on the list of skills and technique based gambling.
So I don't know how the op said that there is a high chance of winning here based on skill & techniques.
Also, he included lottery and slots in his list.
Those are relying on pure luck of the player not by any means skills or techniques.
I do hope he will edit his blog as it is misleading to others.
I do agree with sports betting, because without knowledge of what you are betting on, you are simply blind for what may happen.
This is one of the games that you do not depend on luck but more on your passion with the sport and how much you are familiar with the sports as well as the players.