For the fact that a club performed well in the club friendly does not give a guarantee that they will also do the same in their domestic league because several times I have seeing underdog teams wining those teams that we think they're more superior but when they return to thier domestic league their performance is not going to be like that of thier performance during friendly game so I just feel that most clubs don't value this friendly game as they value thier main league so viewing it this way is wrong.
Big teams prioritize finding the weaknesses of their squads more than winning these friendlies. So I am not worried about Arsenal's defeat. Arsenal have lost two friendlies against Tottenham and Villarreal. However, Arteta has understood the weaknesses of his squad well. Now Arteta will definitely take the necessary measures to stabilize the squad. However, if Arteta fails, then the start of the next season will definitely not be good for Arsenal. Arsenal will face Manchester United in the first match of the Premier League. United have built a very strong squad. So Arsenal have the possibility of stumbling at the beginning.