If a custom knifemaker is offered money to design a knife for Company X, that is his prerogative to accept or decline the offer. Seeing as the economy is as tough as it is now, it would not make financial sense to refuse. Aside from that, a production knife company can be the ticket to propel a custom knifemakers career into the bigtime. It would be considered an honor for a production knife company to ask for a collaboration with a custom maker. I don't see the sword market is as being larger than the pocket/fixed knife market. It could also be that your sword maker friend is a little bitter. I could be wrong.
As people collect knives through the years, their tastes evolve. Some that start with the $10-$50 range (given enough interest and time) will eventually evolve to the CRk, Hinderer, Darrel Ralph knives. Not always, but if the interest in there, people find a way. You might not be at that level yet, or have enough interest to get there.
In my case, I own Sebenzas', XM-18s', Striders',etc. but I also love the designs that Spyderco and Kershaw release and I use them. I'm by no means a knife snob in the sense of "I will only use a knife that costs $400 and up". part of the fun for me is collecting and using all sorts of knives.
Mike Snody - Benchmade
Rick Hinderer - Gerber/ZT
Chris Reeve - CRKT (although there were issues)
Mick Strider - Buck
Gayle Bradley/Fred Perrin/Ed Shempp/ Kevin Wilkins - Spyderco