Need help with rules - clock and move order

So if it is basically endgame and one player have to write moves, other one is not required to do so, he could use time of the player who is required to do so to think and do the move. Cool. Nice to know.

The trend goes to 30s increment. And then you’ll write forever. ;)

Article 6 refers to the meaning of the chessclock and how to use it, if you only want to only use Article 1 which in no way refers to the use of the clock and ingnore all the ruling about how to use the clock in Article 6, you also might restrain yourself from the use of the clock or use it any imaginative or personal way that has nothing to do with FIDE rules, then an arbiter would also appear virtually unnecesary.

Plus it's so obvious according to Article 1 that if you use a clock according to Article 6, in no possible way it is neccesary to complete your move without pressing the button, nor it is mandatory to allow your opponent to move in your time.

6.2.2 A player must be allowed to stop his clock after making his move, even after the opponent has made his next move.

So that seems to be a normal thing. Just think of blitz games. Isn't it common there, that your hand is already on the way to your next move, while opponent's hand is on the way to the clock?

6.7 a. During the game each player, having made his move on the chessboard, shall stop his own clock and start his opponent’s clock. A player must always be allowed to stop his clock. His move is not considered to have been completed until he has done so, unless the move that was made ends the game. (See the Articles 5.1.a, 5.2.a, 5.2.b, 5.2.c and 9.6) The time between making the move on the chessboard and stopping his own clock and starting his opponent‘s clock is regarded as part of the time allotted to the player.
b. A player must stop his clock with the same hand as that with which he made his move. It is forbidden for a player to keep his finger on the button or to ‘hover’ over it.

I don't think the definition of move matters, because if pressing the clock "completes the move", then it's obvious that "move" means more than just moving the piece.

Suspicious that, if this was just an innocent mistake, they apparently knew that it was allowed. I think that crosses into gamesmanship.