Aux lights are pointless for safety, as is hi-viz. It's why the military no longer requires hi viz on base or "visibility mods" on the bike.
It's all about presentation and not showing your right of way-dick.
Aux lights can be cool for daytime running lights but they legit serve 0 purpose.
Unless you aim them way up in the air and out, which then they function as cornering lights.
I disagree. Regardless of what the US military may, or may not, require.
Based on personal experiences over the past 5 years and 70,000+ km (43,000 mi), I know that hi-vis yellow (or green) helps improve rider visibility. I started my riding career in all black gear and learned quickly that contrast is required. I've found that hi-vis orange is too common in North America to be effective. I don't want to look like a stationary construction worker or a traffic cone.
Lights in a triangle pattern increase visibility and improves distance and speed perception by the viewer. The rail roads proved this decades ago. This is why trains have their lights always on, and they are in a triangle pattern. It also works for motorcycles. This is also why high mount brake lights are so effective on cars.
As for right of way, I think we agree. Physics will always trump traffic laws, except in a court of law. In the real world, it doesn't matter if a motorcycle legally has the right of way. A motorcycle can yield for another vehicle with much less drama than them trying to yield or perform an emergency stop.
When ever practical, I try to 'make friends' by signaling or waving through larger vehicles such as transport trucks. They have enough difficulties dealing with the same "texting cager's" that are trying to run us motorcyclists down. No need to add to their stress, or get stressed myself. Besides, it is fun to wind out the bike when passing the truck a moment or two later. And getting a friendly wave, thumbs up, flash of lights, or appreciative honk from the driver always puts a smile on my face!