I'm not a big fan of Orbinho, but I think the point he implies here is vital. If you don't have a habit of scoring and creating goals you're not going to find any keys to unlock opponents at crucial moments.
Villa were all over Spurs in the first 30 minutes today and they still ended up losing by four goals. When we get challenged like that we lose to Palace snd Brighton without creating a proper chance in 180 minutes of football. If you want to change the culture at Arsenal then you have to start here. Make us fearsome again instead of just tough to score against.