You're talking about posteriors. They're talking about priors, presumably foundational priors that for some reason aren't posteriors for any computations. An important question is whether such priors exist.
But your beliefs are your posteriors, not your priors. If the only thing that's locked in is your priors, that's not a locking-in at all.
This is our monthly thread for collecting these little gems and pearls of wisdom, rationality-related quotes you've seen recently, or had stored in your quotesfile for ages, and which might be handy to link to in one of our discussions.