All this suggests to me is that Canon has gotten a taste of the ridiculous prices that people in the cinematography world are willing to pay
Yup, it really is kinda ridiculous. However, historically, it probably has
actually cost that much for a lot of the equipment. After all, if you're going to be releasing a full feature length big movie, you better have the image quality (what defines that is left up to the cinematographer & director) to back it up. And that means really great lenses, lots of very well built tripods, dolly's, lighting (continuous! no fancy strobes for video to freeze the motion), all the people who have spent years learning how to use it, and the organization to bring it all together.
So, while it would be really nice to see some prices come down for some of the stuff that seems like it's just a firmware update away, *cough*Magic Lantern*cough*, the reality is that the high margin stuff at the mid/high end is where they really want to be positioned. And to meet the tolerances expected, it will actually cost more to produce and ensure that nearly every single piece of equipment delivered meets the QA standards for that product.