They didn't get beaten by 30, they had a lot more to "come together" than the Warriors did (remember all of that Kevin Durant will fit in seamlessly, he's perfect for their style of play, they're unselfish anyway so there shouldn't be any issues, etc), and didn't have a core coming off consecutive Finals runs and a record-breaking season.
Not to mention the Heat didn't lose at home, they lost to the Celtics on the road, and their defense was never the issue, it was their offense and we knew they'd eventually figure that out (or at least there was strong optimism). The Warriors' problem is one that I and a lot of people were saying when they got Durant in the first place - they won't be able to get rebounds or stop anybody from getting to the paint.
Terrible comparison.
The general idea that this isn't the end of the world for the Warriors just like it wasn't for the Heat is an okay premise, but that "championship runs have to start somewhere" shouldn't be said about a team that has the core from the last two Finals.