Is ‘The Castle’ profound? Perhaps.
More than profound, it’s pretty amusing. All this endless to-and-froing, having meaningless arguments over meaningless things that go nowhere. The slightest nod of a character leading to a four page monologue featuring only three full stops.
To borrow the review of a critic responding the ‘Endgame’ by Beckett:
‘Nothing happens, nobody comes, nobody goes, it’s awful’.