I have just found and scanned this thread.
I'm sure the OP will have been thoroughly confused by it.
I presume that terms & concepts such as current, current flow, charge and discharge, etc. were coined in the 19th century by people such as Gauss, Faraday, Maxwell, etc. These terms & concepts have been accepted by thousands of us since.
I daresay that they knew of the shortcomings of these terms and concepts.
I suspect that when the physicists derive the "theory of everything", some of these concepts & terms will need to be revised.
For example, if string theory proves to be correct, then current may be shown to be a flow of strings.
I say this because the concept of current flow being the flow of charge carriers does not cover the concept of displacement current.
I believe this concept is derived from Maxwell's equations which, as I understand it, show that there is a displacement current through the dielectric of a capacitor even though there is no flow of charge carriers inside the dielectric: note that the dielectric could be a vacuum.
This raises the question in my mind - why do we need a conductor to carry current?
Obviously the charge carriers in the conductor play a role of some kind.
I'll leave the answers to these questions to minds that are greater than mine.