True, but this probably won't be kept up-to-date and most likely would
be useless for Wikidata users since random very precise data can not be
relied on unless there's a guarantee certain set of data (e.g. all
observatories) have the same accuracy and it is kept up-to-date.

I think we should at least limit it to specified precision (not the case
today) but maybe even more in case precision is too high. I don't think
anything beyond 1m is really useful - please provide use cases if you
think otherwise.