That's actually a really good point.
When you tow noticeably nose-high, you’re effectively tilting the trailer so some weight shifts rearward. With tandems/triples and equalizers it’s not always dramatic, independent suspension is usually even less so, but it can still mean the rear axle group is carrying more. More load = more heat in the tires, and heat is what kills trailer tires and very often leads to blowouts. Nose-low can do the opposite and put more burden on the front axle group. I know some here will think I’m out of my mind, but you can fact check me. I’m positive about this position. Is blowout risk factorially increased? No, but it is meaningful.
I know nose attitude alone usually isn’t
the cause of a blowout. Most of the time it’s a heat failure from being close to (or over) tire capacity, not running inflation matched to the real load, speed, alignment/suspension/bearing issues, older or lower-quality tires.
But to
@BryanValRox point, it's all a risk calculation.