We could opt for getObject instead of getTimestamp, etc. But I am leery of that for 2 reasons. First, I am not sure how many drivers of interest properly handle calls to getObject for java.time types. And secondly, I am unsure of the state of the proposed set equivalent.

A more important reason for that, if I've understood the comment right, is that people might like keeping the table in an usable state for plain SQL queries too. With blob columns representing timestamps one cannot filter on those anymore.