it’s not. you don’t pay 100+ bucks for the movie. the movie trailer is technically closer to the movie, the underlying product is the same (a video is very different from actual art pieces or code). the movie will not cause performance issues with the rest of your life. and “trying before buying” is miles away from “watching the movie completely”
you can however, go to a car dealer and try the car before you buy it (but a car is expensive). you can use 3ds max for 30 days (license is 242€ monthly, still some money). or use photoshop’s trial (license is just 20€ per month). and back in the day there were demos of games you could try before buying them.
the analogies are very different, but they show not everything in life has to be paid upfront without the rights to take it back. it’s usually more expected to allow refunds based on the amount of attachment as well as the price.