I think that both Monkeh and I have already essentially agreed with you.
Actually no - Monkeh seems determined to continue with the line that I don't understand the difference between a zero volt reference point, which may be termed "ground", a "connection to Earth" and a cpc.
You really don't need to keep repeating your point - which, as so very often, is essentially about semantics.
It seems I do need to, when faced with a wilful refusal by Monkeh to actually read what I have written. Although I admit it does now seem utterly pointless, so blinded is he by whatever desire he has to not do so.
The actual word Eric used is not what I originally asked about when I wondered what I was missing. If in order to work IRL a circuit needs a connection to Earth, or needs to have a point to which all other voltages are referenced, or needs to have one of it's components wrapped in a fluffy pink bow, how on earth can it possibly be considered a quirk to have to tell the simulator where it is connected to Earth, or where the point is to which all other voltages are referenced, or which component is wrapped in a fluffy pink bow, for the simulator to run?
If Eric meant that you have to comprehensively specify to the
simulator all the physical parameters which the circuit would need to function for the
simulator to function, that's not a quirk, it's to be fully expected.
If he meant that you have to specify to the simulator a parameter which the
circuit does not need to function then that's not a quirk, that's a tool which is not fit for purpose.