I test every single hook. As I take it out of the pack I check to see the point is ok, and if I can bend it by hand, and When I pull my knots tight I pull the hook with the grip holes on a pair of forceps. I know I'm pulling the centre of the bend, but any weakness should show up between those checks.
I know it's not relevant now, but I have used Kamasan B175's in the past for the bent hook rigs, and I did used to bend them mid shank. I never had one of those go wrong, straighten or bend out. In fact I do still do that when I use them on pike traces as the upper single hook, and again, not had a problem.
I think some branded carp hooks are a cheaper copy of some other hooks, the pattern being arrived at in response to other brands being there first, a tackle brand making cost cutting exercises or a compromise of cost vs strength and reliability. In other words I won't trust some tackle branded hooks at all. Get a hook pattern you can rely on, and don't just follow fashion. Get the right hook for your fishing; don't use a thin gauge hook near snags or where you need to put the pressure on.