Why are Negative Reinforcements Still Present? Are Avoidance and Distraction Realistic and Effective?

In the last decade or more there has been huge changes and advancements in the dog world at large and within the behavior/training sector. Thanks to influential organizations such as The Fear Free Movement, the popularity of negative reinforcements has decreased dramatically. Because Conditioning methods rely on reinforcements, this leaves positive reinforcements to carry the weight. Is this a realistic expectation? The industries insistence of only including methods which rely on reinf...