Yes, never getting within reach of the blade is of course a better option than engaging if you can do it.
The concept of immobilizing the opponent's delivery system is great, but it should be a secondary goal to disrupting the neural signals telling the delivery system to use the knife against you. The person utilizing the knife is the real weapon, the knife is just an inanimate object if it isn't being wielded against you. So any defense system that is built around pursuing the arm rather than first disrupting the brain is going to be iffy at best when dealing with an athletic, committed, uncooperative opponent.
Once the brain has been shocked/disrupted, then you may have a legitimate opportunity for a clamp, disarm, or other controlling option. But IMO unless there is a specific strategic goal behind doing so, you are usually better off just continuing to blast the biocomputer.