There's nothing stopping you from pinning exclusively to keys under your control. A pin counts as satisfied if the hash matches at least one of the keys in the

There's nothing stopping you from pinning exclusively to keys under your control. A pin counts as satisfied if the hash matches at least one of the keys in the certificate chain, including the end-entity certificate itself. In other words, if you do not trust any CA, HPKP can still help you. For most sites, pinning to a small set of CAs is sufficient and a vast improvement, but if you chose to trust no one, that's fine too.