Well, he has his own career as musician, he also does film scores. Actually he was absent from some.Shangrila promo (he doesn't play at the trawlerman live, they were Jim and Matt) and he wasn't part of most of the Emmylou Harris sessions because he was working on some film scores. It's true that he's more focused with MK during the last years but he's still working in some projects without MK...
About his records, I'd say he made them for pleasure, not in order to start a career, same as Richard Bennett. They don't make their living with that records but as sessions musicians.
We have forgot that Guy was a demanded synth player (look his discography) and also as an engineer, producer, arranger etc etc
And yes, it may be true he might look bored when answering lately, but I guess is more because he's busy or we are asking questions he can't answer it he did many times before.