Why don't people realise LeBron James has a tough match-up (Shawn Marion)?

i actually think wade is being guarded by the mav's best defense player people are forgetting the J-Kidd plays the best defense on their team, James played well i guess he shot 50% from the field and dished out 8 or 9 assists, honestly this is how everyone imagined it to be, with Wade being the primary scorer and James being the distributor, the only player in the Nba that i think can guard Lebron is Wade, and Kobe before he got knee surgery