An experiment that uses hardware security keys (like a YubiKey) to replace CAPTCHAs completely. The idea is rather simple: if a real human is sitting at their keyboard or uses their phone, they can touch their security key’s button or bring it near their phone to demonstrate that they are human.
But the default setting is still sufficiently annoying for a lot of people. I agree that for most cases they can be reduced.
Plus if you use their IPFS gateway the domain owner doesn’t have control of this (and the settings are quite aggressive).