Casinos are taking advantage of Lakers fan suckers. They must be seeing a lot of betting on them.
I am not saying there isn't some truth to this, and it isn't really a great line for them, but this stuff is based heavily in reality. Especially on something that is not a prop bet (eg where Lebron plays next season) that generally has a very low max bet because of inside information.
Someone could bet 6 figures on this and they would not want to have bad odds. So people with very inside information are convinced that him returning to Cleveland is dead because the Cavs are currently 52-1 to win the title next year. Where if someone purchased that right now they could sell it back at 4 times the price on a future market the day after Lebron returned.
I'm never going to stake my life to this stuff cause crazy things happen, but this is a stronger indicator than woj and shams and every other insider combined 50 times over.