Your experience, whilst unfortunate, it not representative of the multitude of people using this type of strap without any issue whatsoever.
Sure, I'll stop talking now.
But first
1. the helicoil in a lens mount cannot in the long term take the weight of a DSLR and lens. They are cheapish to replace but bear in mind that sudden unplanned disassembly of the sole thing supporting your camera 3 feet in the air could cause consequential loss.
2. Hanging the camera from a single strap causes more "swing". This is likely to scratch the camera etc on belt buckle, jeans rivets etc and also induce impact related damage. Also it's a single point of stress. You're swinging a several kilo weight off a single point rather than 2 fixed points as designed.
2a. A single cord can also cause spin (and so can the action of picking up a camera the same way and putting it down - it's how phone cords get tangled). It's rather not put rotational force on a single screw that's holding my camera up.
3. Lots of stories on the 'net about SB900s failing. Usually it seems that the camera hotshoe has been stressed and flexed slightly causing poor contact. It appears to be mainly this flash (heavier than most and with a slightly odd foot) but lots of the users had been using BR or similar. It's easy to imagine how suspending a heavy flashgun from a complex shoe that was never supposed to be used like this could cause issues.
4. Many MANY users of BR straps have experienced clips coming undone. They have addressed this a number of times and maybe it's fixed now - like it was on the previous occasions.
I had a Black Rapid when they first came out and suggested a number of improvements to the firm - some of which they implemented. I also have the little BR for an X100 and apart from scuff damage (which renders this camera essentially valueless for trade in) it's great. But I really wouldn't hang a large camera upside down all day from a BR style strap. Lots of people do so without incident. Several do so and suffer damage.
You may view risk / impact differently from me.