Step aside and let others help him.
Nobody else was helping him.   

- Pointing out that there's no single controls setup that plays 
all games well isn't helpful?
- Pointing him to the design process outlined in the FAQ isn't helpful?
- Pointing out that a game list with "all of them" often means having to scroll through hundreds of games that he doesn't care about to find one he wants to play isn't helpful?
IMHO it's a good idea for people to think through what they 
really want before investing too much time, effort, and/or money in a project.
Different people ==> different objectives ==> different needs ==> different builds.
It's not about what I want or like, it's about helping him to set realistic expectations and figure out what combination of game list, controls, and build-style best meets 
his wants and needs.   

I'll dare to say I have achieved Jack of all trades and actually master of at least few.
In all seriousness, if 
anyone can pull that off, it will be an experienced guy like you.   

I'll go further and say that your setup is probably master of many, if not most games.   

That said, no setup can be master of 
all games.
I PLAY video games not just look at my cabinet.
I agree that the true purpose of a cab is to play games, not to look at it 
or be a money pit (. . . well, not 
too much of one  

) 
or endlessly scroll through a list of games that you aren't interested in.
Scott