Soccer-style Kickoffs are Offsides. The plant (non-kicking) foot of the Soccer-style kicker on kickoffs is offsides. Why is it not called?

The NFL should make Soccer-style kickers move back behind the kickoff line, so their plant foot is not offsides as they kick. The salary cappers wouldn't like this idea, but old-school fans would, each team would have an old-fashioned straight-on (Clevland Brown's legend-Lou Gozza) type kicker.