Unless you have these particular cards to hand, it's impossible for you to comment that they are 'all the same' and not defective. These particular cards I've got could actually have ill fitted coolers. Do you actually think I'm new to this Pc lark? I've had most of the high end cards and never come across it this bad.
I can easily tell from your photo though.
I have a full blown Lightning on my desk and 8 Pack has one on his. I've compared your photo to both these cards and the gap is identical, basically what gap, unfortunately.
Yes its clearly a design flaw but there is no fix, there is no revision to the design, this is how they are.