Can you pin leaf certificates?

Quoting https://developer.mozilla.org/en/docs/Web/Security/Public_Ke...:

> Firefox (and Chrome) disable Pin Validation for Pinned Hosts whose validated certificate chain terminates at a user-defined trust anchor (rather than a built-in trust anchor).

I understand this as "when using HPKP, you have to pin a CA certificate, not your site's leaf certificate". If this understanding is correct, I think your comment about HPKP is wrong and it is in fact a good idea to use a CA you find trustworthy and pin its certificate. Agree?