why do some sportsbooks offer way better odds on underdogs.

Noticed some books consistently put juicier odds on long shot teams or fighters, and it's tempting at first glance. I get the excitement of seeing a +400 where everywhere else has +300, but I always pause and think there’s gotta be a reason. Makes me wonder if they’ve got some inside data or models that think the underdog’s chances are even worse than the public believes. Maybe they just want to attract more action on that side to balance out the bets, but part of me thinks there’s more risk for the casual bettor than most realize.

I’m all for value hunting, but sometimes when odds look way off compared to the market, that feels less like a gift and more like a red flag. Curious how people here factor that into their decision making.