It doesn't matter, right? Because anyone who relies on OV/EV certs has chosen to rely on OV/EV certs. If we replaced the whole WebPKI edifice with a blockchain, they'd still make the same decision not to trust the baseline system.

When we talk about the WebPKI being coercively annoying, what we're really talking about are the roots of trust that the browsers have chosen to trust. No browser requires OV/EV.

The use case is knowing that a server is owned by who it says it's owned by as validated by a trusted KYC provider. For example, Stripe has an EV cert. Let's Encrypt does not support OV/EV because they cannot automate the KYC checks. Let's Encrypt is focused on the encrypted connection use case.