Apparently sports betting involves so many tactics but the majority of it's game is based on luck...
No, sports betting is not the same as a casino, where in most cases your winnings will depend on luck. If you are well versed in the sport you are betting on, then your chances of winning will be significantly higher than if you were choosing a result at random.
I think the guy understands this, he might only not know the gravity of the word "majority used."
No one can say any aspect of gambling doesn't have luck associated with it no matter how much we would want to deny that, but at the same time, where skills/efforts should be given praise, luck shouldn't deny them that. There are more times in sports betting you will be almost 100% sure of your predictions, and it will come as predicted. That can't be said of the casino games that are almost 100% reliant on luck.