So i dont get all the stuff everyone said bout miami?

everyone says miami created some super unbeatable team with lebron wade and bosh but did everyone just sought of forget bout bostone who have pierce shaq jermaine ray allen rondo or the lakers kobe pau ron artest, or even denver before the trade j.r smith melo billups martin andersen and nene. I mean its not like there weren't already all star teams made just miami got some pre big names.