This is LeBron trying to build his legacy. If the Lakers win he'll claim that his play through injuries ranks with Willis Reed. If they lose they weren't 100% and he has a built in excuse.
LeBron is one of the greatest basketball players to ever play and the best of his generation but the constant politicking to be regarded as the best ever is tiresome. He's not top 3 and maybe not top 5. Jordan, Russell are 1/2 in what ever order you want. Kareem, Magic, Bird, LeBron, Tim Duncan, Hakeem, Wilt and Oscar Robinson all have the arguments to fill out the top 5.
I'm probably omitting someone but off the top of my head that's the best I can do.