This is not true at all. First, many insects can fly very fast. Even honeybees, which are notoriously poor fliers in the insect world, can reach up to 20mph,

This is not true at all. First, many insects can fly very fast. Even honeybees, which are notoriously poor fliers in the insect world, can reach up to 20mph, carrying a load of pollen or nectar. Dragonflies can reach over 60mph, and some flies may be able to reach upwards of 80-90mph. Second, many of these insects have excellent visual collision avoidance mechanisms and the strongest fliers have exquisite control over their flight. There is a lot of literature on this topic.