I'm not sure todays all stars could beat the Warriors in a seven game series. All star teams don't tend to be ideal as they usually include a bunch of players that need the ball a lot to succeed. A successful team in the NBA tends to be successful because they have lots of cogs that do the dirty work most all stars aren't very good at. I wouldn't be surprised if the Warriors this year beat the Eastern Conference all stars pretty handily if they played.
Warriors small ball lineup vs. East All-stars Steph Curry > LeBron James Klay Thompson = Paul George Draymond Green >>> Carmelo Anthony Harrison Barnes = Dwyane Wade Andre Iguodala = Kyle Lowry
it's not that simple. what you said is partly true. but that is because the "all stars" are the #1 or #2 best players on their team, and they have to usually do a bulk of the scoring etc. but if you actually made them a team and let them play games and practice for a season or 2 then yes they would in fact settle into a system and would dominate. so you are actually using a notion that does not really compare the talents and what would make a good team, you are just comparing something different all together.