And possible multiple test frequencies !
Then it is user error !
Yes and no.
Multiple testfrequencies are common for a good LCR-Meter.
In most cases, the frequency will be choosed automatically.
But this is not the point.
The point is, you could measure all inductance with one meter, no problem what this concerns.
But are the measured values in every case true….no.
It depends from the construction of the inductance.
Try for example a coil for power electronics with a meter which delivers appx 1V and a few µ/mAmperes.
Or measure a coil, which core doesn´t "fit" to the the testfrequencies you can choose/will be automatically choosed.
So what is "great", what is "correct"....when the meter shows the value you expected ?
Could be difficult when testing unknown coils.