Perhaps the acceptability of a pronoun presented in isolation will mirror how much difficulty we may have upon encountering her in a more realistic setting.
Or maybe pronouns, while avoiding the pitfalls of proper names, are no more than freaks of nature; sneaky critters oftentimes avoiding agreement while replacing, and before you know it the whole sentence is over and there we are heading straight for the placeholder of some vague idea rather than risk the host of associations potentially involved with what might sound fine to us but isn’t.
