He knows LeBron, Wade and Bosh thought it was gonna be "easy" to win a title because LeBron told the millions of onlookers that he was gonna win 8+ titles in Miami. That's how.
Also there is a huge difference between taking 3 established elite players and putting them on the same team, and a team drafting players and coaching them to elite status. OKC drafted Durant, Westbrook and Harden and coahed them to where they're at today. Duncan, Ginobli and Parker were all drafted by the Spurs and coached to elite status. The Lakers drafted Kobe (for all intents and purposes) and Bynum and coached them. They did, however, trade for Gasol. That is the difference between how the Heat formed and how those other teams formed. Not saying it's wrong, I'm just clarifying what actually happened.