Why EV betting works.
Sportsbooks odds already include models, data, news, and sharp money, plus vig. You can do research but likely the books have that same research included in the lines/odds.
EV is whether your true win % is higher than the price after juice. -110/-110 implies 52.4% + 52.4% = 104.8%. That extra cut is why books will always win in the long run.