No.
Example:
I run a restaurant. I include a spoon that cost me $0.20 every time someone orders soup. My analytics data is telling me barely anyone uses the included spoon because they prefer their own spoon they already have. The data is also telling you some customers are just poking a hole into the lid of the container to drink directly from it.
I look at the available options and it turns out this spoon company created a new lid that has a hole built into it that costs $0.20 extra.
Because barely anyone uses the included spoon, because this new lid is what some consumers want, and because the spoon and the premium lid cost me the same, I make the switch. I didn't save any money. I just reallocated resources and gave a better product to the consumer. Had I cut the spoon and pocketed the $0.20, I would have saved money.
You're operating the assumption (what if) that Apple built iPhone 12 and realized it's too expensive that they have to cut features out to save money when instead, it's entirely possible they swapped out the brick for the magnet array.