They (INEOS) have shifted the TCO onto the owners; that's their strategy.
The reason for this is that developing a motor-driven pump requires real engineers. Although such a pump is significantly more reliable ...
- ... the pump must be designed so that it can be installed and replaced even with the engine installed in the car (and not just on the workbench).
- It requires a mechanical connection with all the associated consequences, such as gears, a lubricated drive axle with bearings, and also sealing to the outside against oil leaks (like all components mounted on an engine), etc.
- there must be nothing that mechanically obstructs the pump's installation and the routing of the hoses.
- with an electric pump, you connect the hoses and a cable, and that's it, no matter where it's installed in the end: you can mount it anywhere there's enough space.
This saves money in development and, above all, requires less engineering. Any idiot can tack something like this somewhere in the engine bay and connect the electrical cables and hoses; no one has to think about the mechanical drive & connection, lubrication, installation, maintenance space etc ...