Cause Linux has drivers that support it already, that are a part of the kernel. Not likely that FTDI'd manage to get the kernel devs to add bricking code like this. Kernel devs already added code to handle devices that had been messed up by the drivers, actually.
Because windows drivers need non-trivial amounts of support in the form of driver development kit and driver signing. Then you run into issues with which driver to pull for the chip, cause now you are conflicting with FTDI's driver. Other chips that aren't clones do have their own drivers.
