Please don't patronize me. (It's annoying.) I wasn't being dismissive. We don't even know if Jesus actually said these things, and if he did, we can't be certain what he meant. Hence, speculation.

You didn't say "I think this is what Christ meant." You said, "This is what Christ meant." How about a little epistemological humility? I have no idea what you mean by "an existential account of the human person inherited from Heidegger and Gadamer."

The story of Mary and Martha could be eschatological, for example, which is kind of a prominent theme in Luke ("Let the dead bury the dead.") It could mean letting go of mundane life in anticipation of the kingdom coming, any day now.