With the exception of MMORPGs, I actually think videogames were designed to be fun, unique, or popular, because that's what sold. Obviously the goal was to sell as many copies, but the point was to make the game as appealing to as many people, not to make people addicted to it.
Games used to come finished in a disc, and replay value was based on how well the game was designed, either being really fun or having enough challenges to merit subsequent playthroughs.
Now many of the games are designed to never end, to keep you playing out of addiction, less because you're having so much fun, and to always have more DLC. It started during the PS4 generation, and gets worse and worse.
I want what you say to be true for most people who play videogames, but I just don't see it