https://www.youtube.com/watch?v=4UMIRGRd0WQ
This is a very tip tappy goal, NQ. I can't speak for the overall nature of the game because I've only seen the highlights but if Iwobi takes a heavy touch after the first pass from Ozil or if Kante doesn't slip and nicks the ball off Iwobi after the second pass back form Ozil, the opportunity for the 2nd goal has gone and we're open for the counter.
It's great play from Iwobi to make that turn and slip Bellerin in. He spots the run and plays the risky pass. He could have played it back out ignoring the run to try and keep possession. We'll always be a team that plays possession football under Wenger but I don't know how his coaching can stop a player from picking out a good run when playing so deep in our opponents half. It has to come down to individual choices at some point.
For example, watch Theo's movement for the build up. He makes a good run into the box as soon as he sees Ozil getting a touch and he calls for the pass. But Ozil plays a simple pass to Iwobi who's not really in a great position to do damage with his back to goal. It results in the sort of tipp tappy moment you despise and would probably curse if that move breaks down. Could Ozil not have played the ball first time to Theo? Did he see the run? Is it too much of a difficult angle and pass? I don't know. Would a pass to his left for Monreal to whip in a cross be better? Who knows. But it results in a goal. Heck of a pass from Iwobi to find Bellerin, great movement from Theo and perfect cross from Hector. 2-0.