On the other hand, it encourages artists to make songs worth listening to. I've purchased way too many albums because I liked one or two songs only to discover

On the other hand, it encourages artists to make songs worth listening to. I've purchased way too many albums because I liked one or two songs only to discover every other song on the album was complete trash. But at that point it was too late, they already had my money. People who jump from hit to hit will always do that. Don't worry about them. People who seek new and interesting music are immensely helped by risk-free streaming.