Just because they aggressively protect an IP doesn't mean that they ever plan on doing it. An IP is an asset that a company owns, just like an office building or the company fleet of cars.

If someone releases a 3D remake that means that the market demand of people who will potentially pay money for a SE 3D remake decreases and thus the value of the Chrono IP has decreased in the same way that a stock's value decreases. Even though they don't loose any income they see that the value of their (intellectual) property has decreased and thus the total value of their company on their assets and liabilities balance sheet has decreased. Though it sounds stupid for us, as something like this would likely invigorate attention to the Chrono IP, to the typical cooperation mindset it is kind of like someone vandalizing their building an lowering it's property value

You don't have to argue with me that this is narrow minded, I'm just trying to communicate with you about a way of thinking that is probably completely foreign to most people.