You've got a lot more leverage holding the big spike than a needle, so it's easy to apply more force.
There are more parts involved, not just a single solid molded connector like on a needle, so it's not gong to be indestructible like the needle is either.
These have been around for many years. so it's certainly us that's the problem, not the spikes.
That said, I suspect the ones without the cap ("swappable") from Braun might be more sturdy, and there's a BD branded one that's more expensive that might also be more sturdy. Maybe Sempei could order some of those from the place he got his and check them out for us.