Your right, that is just the way it is. If you needed a new radiator cap and went to a machine shop for a quote, it would be a few hundred dollars if they would make it at all. You could then go to a auto supply and buy one for like $6.00. Except for the high end market and people who want something unique or or they own design and are willing to pay, a small case maker can't compete. You need your niche market and it is pretty small.
My mention regarding boats was, when you go in a boating supply you see many of the same items you can get anywhere for like 3 times the price. It is amazing people will pay, that was the basis of my "Sucker" remark. Why would someone pay $3.00 for a SS screw they can get for $.50 somewhere else. When I was a kid I worked in boat yards, they billed people $10.00 a pound for rags and they paid no questions asked. Once you tap a niche market you can make money, people who will pay $50.00 for a sweater for their dog, you know the type. For me a cue case is just a utility, I am not looking to make a statement. That is not a knock I am just not the customer you are looking for. I hate things I have to care too much about or babysit because something may happen to it. To me a case is a case as long as it serves the need.
No doubt. I am big fan of repurposing things. And repackaging items is a an old way to sell them to a new market.
There is also the convenience factor. When someone is at the boatyard they want to go boating and not have to run up the street to the hardware store. So they will often pay $3 for a .50ct screw.
A cue case is utility first for me too. That's why I make $5 ones. I only took umbrage at the idea that the people in the billiard industry are somehow ripping off everyone by jacking the prices on the cases just because we can. Believe me I fight for every penny to keep the cost down on what we make. I get offers all the time for backpacks that are more complicated than some of our basic cases and the price is lower - but only if I order 10,000 at a time.
The entire cue case industry could disappear today and it wouldn't even be a fraction of a blip on the radar of the luggage industry's annual turnover.
The thing is though that cue cases are kind of a specialty item and while there are plenty of other cases which would certainly work as a decent cue case, none of them are actually cue cases and so they mostly require some tweaking to get them working as an easy to use cue case.
This convenience is part of the reason that people like to spend the money on a dedicated cue case rather than spend less money but more time on a case that needs to be modified to work.
As for the custom aspect of it - take the $20 gun case to the local seamstress and tell her what needs to be done and my bet is that you are spending at least $20 more on the modifications. Or what's an hour or so of your time worth? For some people they would rather be plying than
Now, I recommend to anyone to get out there and make stuff for themselves. When I was 12 I made my own table tennis racquet case from an old jacket. I love going to the hardware store to find new things to play with, to the thrift store for vintage bags, picking things out of the trash, and recycling old cases into new ones. I just picked up a Hartmann briefcase for $5. Eventually it will be made into a cue case and probably will still sell for less than the briefcase cost when it was new.
But yeah, you can do a lot with a little imagination.