I think this is kind of silly. The guy just put up staggering numbers in the Finals, again. He has played in, what, 8 or 9 consecutive Finals, and you don't think what he decides to do "moves the needle much"? He is still one of the top 5 players in the game, even at his age, and look at the minutes he played throughout the playoffs! Put him on another superteam, give him some rest during the season, and he will help them bring home the title - again.
TL;DR - super teams are already contenders. Lebron joining a super team doesn't make that team a contender. They already are.
Break it down:
San Antonio was already good - without Kawhi. With Kawhi, they're already contenders. Adding Lebron doesn't make them contenders, they already are.
Houston was already a contender and had the Warriors on the ropes. Adding Lebron doesn't make them a contender, they already are.
Warriors... we don't even need to talk about this.
Boston, nearly knocked Cleveland out, they're already contenders. They can add Lebron, but he doesn't make them a contender, because they already are.
Philly... I mean, everybody has already slotted them in as a contender in the East next season. Adding Lebron makes them, what? More of a contender?
So that leaves us with the Lakers. He goes to the Lakers, let's even just say Paul George joins them, and then they move their young talent to get some rusted out vets that can be "trusted," because that's how Lebron do. You really want to say that Lebron, George and whatever creaky ring chasers end up in a Lakers uniform can contend against the Warriors, Rockets, Spurs and the rest of the meatgrinding teams in the West? Or even what it's likely Boston and Philly will look like in the East?
I don't. That Lakers team doesn't scare me relative to the rest of the NBA. That means they're not a contender.
Not a contender.