The problem isn't "it's not bought forward by that much relatively" in as much as you have an agreed timeline to have coordinated patches (e.g so one org doesn't push a fix before other orgs have). So if you have a bunch of orgs set up to do a release on day X, and then publish on X-[whatever] then you are effectively zero-daying.
Is it super important in this case? shrug.
But imagine for the sake of argument there was some undocumented cpu behaviour "if instruction x,y,z are executed in that order with these constants then catch fire", then having anyone pre-empt the agreed update time could be bad.