Problem getting fruit flavors and aroma

[Billorly]

So recently I brewed a strawberry blonde and using 5lbs strawberries that were pureed and added to primary about a week and a half after fermentation was complete and then let sit for another 2 weeks. The problem is that there is no strawberry flavor or aroma. Is this a problem caused by not using a secondary?

 

[Tantalus]

Most fruit additions I hear of are added in secondary. The high fermentability of sugars in fruits means that much of their content will be converted directly into alcohol, which is probably the reason why.