Sportsbook gambling isn’t completely focused on luck, it does give room for those who know the game or sports to predict just what’s to expect as possible outcomes of a game. You have historical data as per head to head, the grounds on which the game would be played, winning streak, what’s happening on the table, fixtures ahead, what league is the teams participating in and many more. All these statistics helps you to make better predictions and brings you closely to luck and wins.
I understand what you are trying to say but still we have to accept that where the word gambling is used, everything will definitely depend on luck, yes in sports betting many times strong and weak teams can be identified through analysis and in some cases it is possible to win but we will see many matches where strong teams lose to weak teams so there is no guarantee that analysis skills will always come in handy.
And this is why gambling should not be staked for any purpose other than entertainment, because if people think that there is a possibility of winning by using strategy or skill in sports betting, then they will start investing here instead of entertainment, which is definitely not auspicious.