~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.
The thing is that it's unlikely to end up in a position that is positive every day. It's just not probable. Imagine flipping a coin every day and getting a head every day. Some days it will be tails. And in casinos it's even worse than 50/50.
And this is something anyone can simulate with excel or other similar software, after all you can generate random numbers with it, so you only need to tell the software the odds of winning, the payout and the number of times you want for the simulated coin toss to take place, and then you can then take a look at the results.
If you flip the coin just tens of times then there will be instances where you will win and some in which you will lose, but if you flip the coin millions of times then you will always lose.