Are Noctua coolers and fans really worth it?

I love the idea of being able to email Noctua for new mounting hardware and having fans that will last forever, but seriously, on Amazon, I can get one Noctua NF-A12 for the same price as a five-pack of Arctic P12s and an NH-D15 G2 for almost five Thermalright phantom spirits.

I mean, really, there's no way they could possibly be worth it. That's 560 AUD for cooling rather than about 120. Can anyone speak to this?