Gambling is unpredictable. Thus, there is no single betting strategy that will lead to regular wins.
You can't generalize like that as there absolutely are people who make a living through sports betting. Maybe not OP (since they haven't shown proof), but legitimate professionals exist. These bettors consistently make quality picks and have proven long-term profitability. Just because most people lose doesn’t mean skilled, disciplined bettors can't win over time.