Subaru engines seem to continue doing Subaru things. That being said, any car that is subject to sustained lateral G forces have the potential to oil starve.
It doesn't surprise me that a manufacturer wouldn't want to warranty anything that has been tracked at all. Sometimes damage isn't immediate or catastrophic and instead deteriorates over time. At the end of the day these are still street cars and not race cars.
Most cars will need some kind of modification to overcome the stresses of track use, such as heat, oil starvation, or simply making sure things are tight.
That being said, I can understand the frustration. I think it's important to note that there is a lot of marketing behind the motorsport aspect of these cars. It's important to remember this is just that, marketing.
I think any owner of an enthusiast car should understand the potential risks of bringing their car to driving events, including having your warranty voided even if the event was not directly related to failure.
