I'm not interested in a drawn out exchange over this, but I will say a few points ...
The problem with the idea behind "inspired by" rather than "based on" is that video game movies don't have very good plots to begin with.
I've seen multiple movies with worse plots than the current "average" VG adapt.
Regular movies that were written to be movies beat them out in basically every category.
I agree that VG adapts currently average "below-average" compared to standard Hollywood offerings.
You either go all-in on it to satisfy your hardcore fans as well as a few newcomers ...
Problem here is some "hardcore" fans won't like a movie even if the producers go all-in (even LOTR gets hate).
... or you do a "inspired by" scenario and end up pleasing nobody outside of the foreign crowd
I will disagree here.
A movie will have to be BEYOND GUTTER TRASH in order to please no one. You have to consider that the bulk of movie-goers fit in with the "General Movie Audience", who are people JUST looking for something to entertain them for ~2hrs with some various amount of romance (for the women), explosions, shootouts, chases, hot actors, and other elements of eye/ear candy. And as for "story", I'd honestly say story matters the least with the GMA as long as a movie "makes sense". This is why movies make the money that they do regardless of what critical sites (like RottonTomatoes) may say about how "bad" they are (see: Twilight).
In regards to VG adapts, while your opinion of the average one may be significantly low, they, IMO, are not bad movies. I've watched a great many movies so far in my time, and believe me, I have seen my fair share of bad ones! Most recently was The Apparition, a movie I'd like to see get buried the same deep dark abyss of eternal suffering as the bulk of old bad Atari games, Uwe Boll movies, Uwe Boll, Justin Bieber's future self, Edward Cullen, etc.! Say what you want about Silent Hill, that movie was 10000000000000000000000000 times BETTER than The Apparition in my book!!!
Anyway, with that said, VG adapts right now are the stage where Hollywood is looking to put below-average effort into making average profits (through the GMA). And so far, they've done that, and that's fine. Eventually, as long as games remain a relevant option for movie source material, enough people will gather into the right places and push the right buttons for VG adapts to be taken seriously, get better funding, and be treated with similar care as what we are now seeing from Marvel, Christopher Nolan, Peter Jackson, etc. (respectively).
ADD: On the topic of MGS, with Avi Arad onboard, this already has the potential to raise the high bar for what can done with a VG adapt. Maybe we'll have the surprise equivalent of Bryan Singer's "X-Men" here!