You are not overthinking this at all, you are hitting on the difference between a profiler and a modeler. A Kemper profiler captures the amp as it was set. You have a tone stack and can edit, but it won’t behave exactly like the real amp so anything beyond small deviations may warrant another profile. You won’t need hundreds per amp, but you might need a handful. The modeler, models the behavior of the controls. If you turn the mid knob it should behave just like turning the mid knob on the real amp. The downside is if it didn’t come with a Valco model, you can’t make one or profile the amp you have. You need to choose a different model that is hopefully close, or beg the vender to include your amp in a future update. Speaker emulation is currently the part where modeling lags the most. IR’s capture the frequency response/coloration of speakers very well, but they do not capture cone cry and non-linear speaker distortion.