Betting without research means you are gambling blindly.
While this is true in some cases, it is not always the case, especially when you think about sports betting. It is definitely worth doing some research before placing a bet. For example, in today's Champions Trophy match between Bangladesh and New Zealand, no matter how much research you do, New Zealand is definitely far ahead of Bangladesh. Before betting here, if you look at the statistics, it will be clear that New Zealand performs better at Pakistani venues than Bangladesh, which is why New Zealand is definitely ahead in betting in today's match.
Yes, no one will benefit much by researching or using their strategies in casino games because they are randomly won by the machine. However, in the case of sports betting, different types of research are definitely required because a team has to be selected based on how well a team plays and how well a player of a team is capable of playing. And those who understand more about sports and know how well any team plays can get better benefits from sports bets. However, not all teams are always guaranteed to win. Because sometimes during live play some weak teams can be seen doing well and luckily they can even win a competitive match. So it is not possible to win with confidence in any type of gambling. Gambling is always risky