Players have a duty to be present for their games (2.3.1); Separate rules cover both players absent and one player absent (2.3.2, 2.3.3); Lateness can lead to optional or compulsory forfeiture, with defined consequences (2.3.4, 2.3.5, 2.3.6)
Why people argue about this
People often assume that being late is just a minor infraction without serious consequences, forgetting that the official rules clearly state lateness can lead to forfeiture of their game if deemed necessary by the tournament organizers (2.3.4-2.3.6), thus misunderstanding how seriously attendance is enforced in Scrabble WESPA.