[Antennas] Buried radial question

[k1drw]

I was reading a reply to the question about buried radials - insulated -vs-
non-insulated. Excerpt from the answer:  "The radials should present the
lowest loss path possible in order to not degrade the efficiency of the
antenna installation.  As to burial, the whole idea of a radial field is to
capture displacement current being returned to the transmitter via the coax
inner braid".

I have learned much technical detail about this hobby in the couple of short
years as a Ham but several fundamental concepts still escape me. I have just
moved to another state and do not know any local Elmers yet.

QUESTION:  I have an HF2V and use the radial kit supplied for this antenna -
12ea 32' insulated, slightly buried radials.  I still don't understand the
concept applied here with the radials collecting and returning current.
When I installed my HF2V, I thought the radials reflected RF like the main
part of the antenna, just serving as the other half of a dipole.  If the
radials just collect current and do not radiate, what happens to the current
collected - what is its use...?
  Dennis, k1drw