Yes, very true.
As background, Let's Encrypt's shortlived certs currently have a CRL URL in them and are revocable. However, back in April the plan was to eventually remove the CRL URL from shortlived certs. See: What's the future of OCSP stapling? Is CRL reintroducing the downtime problem? - #16 by aarongable
Note carefully the distinction between the cert itself having a CRL URL and the possibility of a shortlived cert still being revocable and appearing in a CRL dataset.
General shortlived profile info: Profiles - Let's Encrypt