Higher located tail light must be an upgrade when riding on crowded roads where all kinds of vehicles drive close to each other.
I have driven cars on US highways. Mostly during very low traffic very late night or very early in the morning, from or to airports guided by a GPS.
Sometimes 4 lanes where slower traffic can just show up in middle lane, huge trucks passing on each side.
I would not ride a bike on those roads in heavy traffic. More large vehicles there than here.
I have ridden my K6 on German Autobahn, Austrian highways, alp roads, Italian highways, French Highways and Spanish Autopista in high speeds.
Smaller coastal/older roads from before the newer highways. Daylight, evenings and late when dark.
4 holidays with 5000-6000km each time in the 80's.
Headlight on at daytime was not mandatory there as we had here.
None of those with similar chaos as on US highways with several lanes to each direction.
Faster vehicles on left lanes fastest most left and slowest most right.
I know that is the law in the USA too, but the reality was different the few times I have driven there between 2001 and 2017.
Northern Jugoslavia 1984 on narrow mountain roads where suicidal car drivers passed others in sharp corners with no sight, using the horn or not stopping at stop signs in smaller Italian cities when none did that was another kind of danger a good tail light could not help me.