Does nobody on the development team care in the slightest that this bug, which could probably be quite easily fixed, completely ruins scripted sound effects?

You don't appear to be fluent in English, so I think you may have misunderstood what I wrote.

Quick update. I've also noticed the same behaviour with say3D. If you use the say3D command when inside a vehicle in 1st person the volume will stay significantly reduced regardless of future actions (exiting, changing view, etc).