POLL!!! Do you use curse on hit?

Yet more proof of how limited and unintuitive the support system is with these trigger gems. Why do these gems not just make that a passive effect on your attacks and casts, with reasonable, well-spelled out restrictions?

GGG's answer is probably that this would trivialize cursing. But then why does this support gem exist, when it's suboptimal for 99% of situations? No one is going to take convenience over killing shit quicker in an ARPG. It's a bad choice. And how trivial is cursing already anyway, with increased AoE, a totem, or in a party?