What you might not understand is that everything on the PCB, including the PCB itself is a component. The PCB is a parallel path. The traces have resistance, capacitance and inductance. That's just the way it is.
A broken trace, say 1/4" apart in free air is an open until somebody puts 60 kV across it.
Zero and infinate are very difficult numbers to obtain sometimes. 0 resistance is impossible to obtain,, just like 0 Kelvin.
Zero as a floating point value in a computer may also be a difficult number to obtain.
I've worked on boards where a "fingerprint or the oils left by your finger" rendered it unusable until cleaned.
The oild left by a fingerprint in a UHV (Ultr High Vaccum) system eds up showing up as a virtual leak. It's not a leak at all, h=jut the fingerprint outgassing. UHV is, below 1e-7 torr:
https://en.wikipedia.org/wiki/Ultra-high_vacuum
Repeat:
There is no such thing as zero resistance.
OPEN and SHORT are relative concepts. You might be better using OPEN PATH and THE SHORTEST PATH.
Nearly every thing from the PCB to the wires are "components". They have the basic properties of resistance, capacitance and inductance.