There are a large number of reasons, here are a few.
1) The average ticket price. In comparison to a restaurant where a meal can range anywhere from $5 -$50 or a Fitness membership typically $10 -$20/month. A single transmission repair averages about $2,500, not to mention ongoing service and maintenance plans. Higher ticket prices with great margins = more profits.
2) Inventory in a Food based business tend to have "expiration dates" which means whether you sell enough of your product or not, that money is going to waste. With the MONSTAR Automotive Center, your auto parts and inventory won't spoil on the shelf!
3) Overhead Costs such as a real estate lease, utilities, phone/internet service are typically about the same. Square footage of these 3 categories can range anywhere from 1,500 -10,000 sqft and when you consider the average revenue needed to just pay your overhead, selling a $1,500 auto repair sounds much better than a $15 meal.