I'll put the TL;DR up front:
Video games cannot be considered art because the people who make them are fake artists.
Art is Dead
It's a well known fact that the art world is completely fucked. The only thing left of what was once a constant press upwards into heaven to craft the most beautiful masterpiece has been replaced by a push towards abstraction and momentary expression by (((academics))) with the intent of creating a massive money laundering scheme for the upper class to exploit.
Take a moment to browse sites such as DeviantArt, and you'll see an infinite number of shitty Sonic characters to exhibit this. But if you dig a bit deeper, you'll also find some works posted online which can be quite magnificent. Most are crafted through digital means, or edited using them. Others are still painted or drawn, to such an intense degree that they can appear even more realistic than photographs. Through the use of colors, these artists continue to prove why (((those who claimed photography as the death of painting))) were completely ridiculously in their assertion.
The subject matter is the most interesting aspect to this, however. Much of the art online is fan art. While many artists do work to create their own content, most of it reflects their love for other artists. And in this society, with its laws, they can make no profit off of this. Indeed, most of those with actual artistic talents are doing it completely for free.
Enter Patreon and Similar Programs
Patreon and similar systems promised something beautiful: The chance to allow these artists to support themselves off of their works. In an ideal system, this would result in those capable of producing worthwhile content being rewarded for their work. And for many, it has been to some degree successful.
But then you return to the original problem: People who consider themselves to be artists, when they have no actual artistic talent. Instead, what they possess is an intense political drive, which more often than not leans towards leftism. Yet leftism is incapable of producing proper art. Instead, it produces more of itself by destroying others, like a virus, and it desires to rewarded for little work. Those who profess it have no wish to create, seeking out only a profit. And so they advertise, and make a massive scene, drawing people in. Meanwhile, a person who loves art for its own sake continues to draw, hoping their work will speak for itself. Or maybe they don't care.
So What Does this Have to do with Games?
The only way art can be created is if the person making it cares about their work, money second, and other things like politics after all of that. Otherwise, it's a political cartoon at best, and a piece of trash at worse. When a game is made simply for the purpose of being a game, that doesn't matter. It's meant to be entertaining, which means all it must do is entertain.
But leftists want to make art. They don't want to entertain. So they attempt to do the former using a medium for the latter, and fail spectacularly at both. Which is why video games nowadays are shit - they're not art because they aren't made by true artists, and they're not entertaining because they aren't made to be. They're only meant to make money. And unfortunately, that's exactly what they're doing. Until they stop doing so, nothing is going to get better; it's not.