Eh? Don't be ridiculous, this product is aimed at people doing long distance racing - anyone entering those events will be able to mend a puncture.
I almost wanted to change that to "anyone entering those events will ... purchase an appropriate bike", then I realised you were joking!
This thing looks pretty good for the kind of people who have a nice bike that they ride on dry Sunday mornings, who might fancy a one-off challenge like C2C. When I say to people I have a separate bike set up for touring they are totally shocked (and the cost of that whole bike was less than this rack). The light weight of the rack is pointless given the massive weight of the (empty) panniers, it's just for bling points. Given the QR you would take it off any time you're not using it.