"Because doing that will give you comparable picture quality as buying the DSLR and the lenses, right?"
There's a very good reason why the Canon 1Ds MkIII body only costs $7k. And why the professionals stay the hell away from superzoom lenses.
And it's not free of distortion or chromatic aberration, read the review and look at the pics. It's also not particularly sharp, and the reviewer commented specifically on a sluggish response.
Apart from that your comment was spot on.
Ah dangnit, I think I just fed the troll.