This surprises people? When I see "Nichicon" or any other big name Japanese cap either mixed with Chinese randos or in any built-to-a-price cheap consumer product, it's just a given that its 100% counterfeit. That doesn't mean they're any worse than any other random no-name cap. I just consider them no-names.
What moron would use expensive caps when cost matters and almost no clueless consumer will know the difference? Genuine ones only come from major distributors and in the kinds of products you'd expect to see such things. Fakes are almost always 105C too.
A little funny to see this from an assembler but unsurprising. If you complain they'll probably be like "Duh they're fake. You were expecting otherwise??"