~snip~
But as long as that person can collect valid data from various sources, they can determine who they will choose because they already know who is superior in the match. Many people think that sports betting doesn't require much and just pick a well-known team or player without looking for other information. But if they have many years of experience and analytical sports betting skills, they can win. But it will come back to their luck because we know that in gambling, we can't win if we don't have luck. So making $100 daily will be more difficult than earning under $10. Even in that way, there is no guarantee you can earn $10 every day.
The amount doesn't matter too much really, if you are able to make bets and win $10 a day, you can simply bet 10 times more and you'll be earning $100 a day, and so on.
Agreed with your thought, it is impossible to win consistently in gambling and also impossible to win money consistently. However, the winning ratio can be increased by applying different experiences and strategies, but there are no guarantees. If there was a guarantee of winning in gambling then everyone could own a lot of money by gambling which is impossible in reality. I think a gambler is successful in gambling if he gets relatively high winnings, betting amount doesn't matter. Because the more money he keep in bet his amount of money automatically increased.