Well seems to me you do complete the circuit. With some 1000 Ohm resistance of your body, plus shoes depending on whether you’re wearing them and how you’re posed, plus whatever your floor provides to ground. Tile sounds ideal, but I’m not so sure about wood.

I guess floor heating would not be using metal piping, so at least that’s no shortcut. Maybe rebar could be trouble, but probably the wooden flooring shouldn’t be resting directly on the rebar.

I guess in most normal situations that would be enough resistance. I concede that point.