The electric razor really works on a different principle than a manual razor. It has blades which are moving very fast, and frankly are very dull. That requires hairs that are rigid so they stick up through the foil for guards. That is why William's 'Lectric shave is recommended. It dehydrates the hairs making them stand up straight. Wetting the beard defeats all this.
I am sure that the shave is far more comfortable with shave cream as opposed to a dry face just because it lubricates the skin and maybe reduces razor burn which is an inherent problem with electric razors, but it will result in a less close shave.
Regardless or wet or dry, the Norelco "lift and cut" system is an invitation to ingrown hairs just like it was on the old Gillette Track II.
Electrics are convenient. I use one myself to stretch a two day straight razor shave to a three day shave. But in no way do they give a close comfortable shave as compared to a SR, and with the Norelco there is the ingrown hair issue. Not so much with foil electrics.
I don’t use anything on my face and get a very close comfortable shave in the morning before showering. Your first sentence is very important information. “The electric razor really works on a different principle than a manual razor.” An electric shaver is more like a pair of scissors rather than a blade. Either using a product like William's 'Lectric shave or shaving cream/jell may help acclimate your face and beard to your shaver. I have a heavy beard and I assume that by using a screen type shaver almost daily for the past 40 years has acclimated my beard and skin to just dry shaving.