As the end user I'm not now or ever were concerned why my many ST tires failed me or for that matter any tire brand/type failed. I'm not talking a one tire issue but several.
I either change brands or tire types and moved on down the road happy from that point forward that my tires on my trailers stopped having those types of issues.
When a new tire that has never been on the ground and hanging on the back of a RV's rear bumper suddenly blows does that ring a bell with anyone. This is actually not a rare occurrence.