Yes, evaluate market demand by making it more expensive and doing 0 marketing. /s
Am I crazy in thinking that doing it this way is close to meaningless?
You don't really have to market something like this. There is a VERY small subset of users that NEED this feature, and they will seek it out. The kind of user that wants this is not as price sensitive as a consumer. A few hundred extra dollars doesn't matter to an organization that needs this for an RF sensitive scientific environment, or a secure facility.
See also: iPhones with cameras removed. You've likely never heard of them and they are not marketed at all, but if you are one of the few that need one, you know they exist, and the price premium doesn't matter. $1400 for a used 2020 iPhone SE, if you're curious. That's a 10x premium on what you would pay for that phone anywhere else.
This never gets old: https://biggaybunny.tumblr.com/post/166787080920/tech-enthus...
Will someone really pay me $1000 to remove the camera module from an 2020 iPhone SE? Are there some huge obstacles to that? I've disassembled the 2016 model (for battery replacement) and it was a pain, but not a $1000 pain.
For that matter, what about just attacking the camera from the front, with a drill?
Drilling has some obvious issues, most notable if you go too deep you’re going to hit the screen.
(You also need to remove the front facing camera, which is also a more involved operation.)
These devices are sold to large institutions. If I need to give 30 employees at, say, a nuclear plant phones without cameras that they can take near classified/confidential equipment, I don't want a guy with a drill, I need a company that can provide 30 phones, a regular supply of replacements and a trustable piece of paper for the security auditors saying these devices are compliant. I need a phone that our security can glance at and know that it is ok. A phone with a drilled out camera is not the same as a phone with no camera for these purposes.
If I need to take photos inside that plant, and make sure that the photos will not be exfiltrated without going through a security audit, I need that camera.
At the scale that these institutions operate paying an extra $1k for a phone or camera that has security compliance outsourced is a no-brainer. Your sourcing team will spend more money investigating if the DIY route is possible than they will just buying from a trustable vendor.
I don't know how you can say with confidence that a few hundred dollars and not marketing this wouldn't have an effect on sales.