Jokes aside, you did miss a big part of my argument.
Whether something
IS art as a whole is, at the very least, debatable, but whether something, as a whole,
CAN BE art (meaning that it has artistic potential), is another thing and a quite different one by that matter.
Films are commonly refered to as the "Seventh Art" for a reason. Novels are considered to be inherently artistic for a reason. Videogames are not.
In my experience with arts, which is no little given that more than half my family are artists ranging from sculptors to poets, both filmmaking and writing are commonly considered to have artistic potential. Thus, through this (pretty much bandwagon) logic, people are able to draw a judgement on whether a form of media
CAN or CANNOT be art, in other words, people can recognise that a media, as a whole, has artistic potential.
Note the lack of "I" in this paragraph and the presence of it in the next one.
In all honesty, you can wave at me that thing saying "but Fifty Shades of Grey", but that doesn't mean I'll quit recognising books as a media with artistic potential. You can show me the most horrible Michael Bay movie, but that doesn't mean that I'll stop viewing movies as a media suitable to properly deliver an artistic message. Furthermore, you can give me CoD and tell me that it's not art, and while I'll agree, I will still think that videogames as a whole can be used to deliver an artistic message, in other words, have an artistic potential.
Problem: Those are my opinions and apparently not many more people's. Why? Because not many people believe that videogames can have artistic potential. Why is that? Because of the young age of VG as a media.
TL;DR - It's not about being art or not, is about the possibility of creating art within a media. People seem to think that is not possible in videogames.
I don't really think the opinion video games are art is that uncommon though, especially in the U.S. where the surpreme court ruled that they are a valid artistic medium (and thus protected by the first amendment).