My t'pennys worth here.! In all honesty I've never heard of this chap, Card, but it seems, to me anyway, a bad dose of "good" old fashioned green headed jealously to me.
I forgot to add I don't read sci-fi either.!I'm not a great 'fantasy' reader myself, apart from the Potter seven parter, I've got Northern Lights trilogy, and real classic The Once And Future King and Lord Of The Rings. And that's about my quota.!
That was my take on it, too.I just assumed he was being sarcastic to make a point.
I have to admit I never read Harry Potter regardless that the books are all neatly stacked into my shelf. They were a present.
However, with all the media that went on in the past years I always had the sour impression of Rowling making a media fancy about her books herself. There were always little statements she made to get the media and therefore the speculation going.
She topped that with saying it might be that HP would die in the last book. Of course he wouldn't because who would kill a cash cow ??? Regardless if it's supposed to be the last HP book or not. There will definitely be a follow up someday.
Personally I don't like her, and I second Card's words. He pretty much said what I've been thinking the past few years and I did not have to read her books for that conclusion. ;-)