Part of the fun of a football goal is its rarity. Every one of them is a miniature miracle, because we don't know how long we'll have to wait for another. If there were suddenly 10 goals per match or something, they would feel less miraculous and a lot less special.
A few more wouldn't hurt anything, however, and that's what we're getting in Europe so far this season. Average goals per game are up six percent so far in this year's Bundesliga and Ligue 1, up 12 percent in Serie A and up an incredible 39 percent in the Premier League!