As I said earlier, if Lebron was fine with being traded, I do think the Lakers would be able to get a better package than Simmons, Maxey, and Thybulle, while also still allowing Lebron to be on a contender. I mean something like Ayton and Bridges would probably be on the table and I'd much rather have those 2 if I'm the Lakers, especially since that really allows Davis to play PF where he wants to be. Miami could easily be back in the mix if Riley and Lebron made up. I could absolutely see Boston putting Brown on the table in that situation and I think the Lakers would much rather have Brown than Simmons (especially with Russ still on the roster). Porter or Murray is probably available from Denver (and heck maybe Denver would give up both to pair Lebron and Nikola). Paul George would probably be on the table and Lebron wouldn't even need to leave L.A.
There are just so many potential landing spots that just make more sense than a Philly trade for Simmons. That said, if Philly really wants a Lebron for Simmons swap, I'd make them take Westbrook also. Westbrook and James for Harris, Simmons, Thybulle, and Maxey. That seems like a better value proposition for the Lakers and puts the trade on more equal footing with other trades that would potentially be out there.