I don't think the win was entirely down to luck. Even though Arsenal faced considerable pressure from Tottenham but they indeed have a solid defense. Arteta knows they cannot afford to play an open and offensive game because, without Odegaard and Declan Rice, their rhythm would not have developed optimally. Therefore, they tend to play defensive football and wait for a good opportunity to counter-attack. That patience paid off, when Tottenham was so frustrated in chasing goals, it was Arsenal who broke the deadlock.
I agree with this that Arsenal's victory against Tottenham was not entirely due to luck. Because Arteta has planned a good strategy for this match. Arteta always knows the limits of the squad strength that can be played for each match that will be played. So he always has different plans which are always adapted to different situations and conditions. The injuries to Odegaard and D. Rice, who had to miss the match due to previously receiving a red card, have made Arteta decide to use a slightly different strategy. But the results turned out to be quite effective and frustrated Tottenham because they had difficulty penetrating Arsenal's defense. And Arsenal patiently waited for opportunities to come and took advantage of them when they came. And yes, that patience has indeed produced good results. Arteta becomes more mature with each season as a professional coach.