Oh bullshit.
There was one control arm manufacturer that had failures, CAP. They only had a couple that anyone could actually show pictures of, and they had documented quality issues. Hell I had a set. They were bought out by QA1.
I’ve never heard of any other manufacturer, other than CAP, with control arm failures. MagnumForce had a couple of K frame failures early on, but I’ve heard nothing recently.
I’ve never heard of any QA1, Hotchkis, SPC, RMS, Firm Feel or honestly anyone other than CAP with control arm failures. It’s not a thing.