>What are people possibly using these for?

Eggs and egg dishes (e.g. pancakes) mostly. No other pan works as well. Washing after cooking is also very quick and easy. Perhaps you've never used a non-stick pan that was maintained correctly, i.e. never overheated, stirred only with silicone utensils, and washed by hand using only non-scratching sponges. Most non-stick pans I've seen owned by other people have been in poor condition. If you think cast iron makes better food you probably use it for searing, which should never be done with non stick. And many people falsely believe wooden utensils are incapable of scratching non-stick pans.