LOL stop man, this aint college.
i mean he's right tho... but it's not some marvel.. EVERY #1 player has the same power as lebron
now realize i said #1 player.. as in, "my god, we would be a lottery team without him" type of player
all ANY of these dudes have to do, is walk down to the owner's office and say "look, if you don't do _________ , i'm not resigning and i'll sign with __________ and you'll have to play against me every year"
ain't too many teams losing their #1 player for their #2 and down. and unless it's pop, most teams would say fukk their coach too
now if you old... ain't that good no more... or not the undisputed best on your team, then nah, you can't do that. but this is basketball.. there's only 5 starters and maybe 15 legit megastars in the entire game... players have way more power
edit:
but also, you gotta figure, most dudes aren't dikkheads like bron. to do this, you gotta be willing to throw your teammates under the bus, throw your coach under the bus, abandon your team, make plans to leave your team, and act an ass towards the people you want gone UNTIL the owner/gm is now forced to make the trade
who has the power to go in an calmly ask, with no threats behind it? now that is the question