Don’t know if it’s possible to change it, but the IOS app would eventually change it back anyway. Agreed, it’s too unreliable to be useful for location tracking.
Instead, it’s best to use multiple sources for location tracking, and base your automation off of the aggregate location instead of the single source.
Yes, I’m doing the aggregation now, but I want to have nice “bubbles” with people photos in it on top of the home screen and these can be only generated by device_tracker. Sooo… maybe it’s time to create a dummy tracker that could be updated by an automation rule.