1.) A new movie is like 20-30 bucks to buy the disc and a new movie in theatres can easily run you 15-20 bucks depending on where you live. There are also plenty of 8-ish hour games that cost 60 bucks.
2.) Time to dollars spent is a silly ratio to judge a game's worth anyway. Some game should be long. Some should be short. Being long doesn't make something better or more worthwhile. You don't pay a higher ticket price to watch a 3-hour movie over a 1.5-hour one. Arkham Asylum isn't worth less than Arkham Knight just because the latter takes more time. RPGs aren't objectively worth more money than linear action games.
3.) "Video Game" is just a term we use because of what video games were when they first became a thing. It's an archaic and inaccurate term to describe the medium as a whole as it is today, that only sticks around because everyone's used to saying it. It doesn't matter if Gone Home is a game, because it is still a video game regardless.
4.) Gone Home does have a failure state. The failure state is not finding the things/information you need to get to the end/understand the plot. Just because there isn't a game over screen, doesn't mean you can't fail. Now, it would be extremely hard to fail in this case, that's true. But a game doesn't have to be challenging to be a game.
5.) "It's not a game" is a lazy criticism designed to dismiss a video game for not being what you want it to be that doesn't really merit discussion to begin with.
6.) A story told through discovering events that already happened is still a story. Gone Home is a story as much as the Souls games are. Just because you do not care for that kind of storytelling does not mean it is not a story and does not mean people are wrong for being engaged by it.
TLDR: Everyone is free to enjoy or not enjoy different types of storytelling methods, different types of games, and prioritize their spending the way they would like. That doesn't mean that storytelling methods you don't enjoy are not valid. That doesn't mean video games that aren't suited to your tastes are not video games. It also doesn't mean there is some objective formula for how much a game "should" be worth based on something as arbitrary as run time.
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