Dating opening times is going too far IMO: if it's open, and longer then 7 days in the fridge you toss it. Which is to say, if you can't remember when you opened it, that's also a good sign not to eat it.
It's not like any of this is hard to do.
Although this:
> a home dishwasher doesn't actually sterilize anything,
is not really a statement on anything. "Sterilize" is a very specific term which means you did a process which is guaranteed to kill extant micro-organisms and viruses. But the reason hand-washing is so effective at preventing disease is that it doesn't necessarily kill them, but soap will wash them off surfaces very effectively. They're still alive, but they're in the sewer. Commercial dish washers aren't designed to sterilize either - they're designed to get things clean as fast as conceivably possible (i.e. single digit minutes, not hours).
The converse of this is the problem with old rice: reheating rice is periless, because while it will kill the bacterial contamination, the toxins remain and that's what will make you feel sick if you eat it.