I have no plans to get a bullet-proof vest or equivalent.

I'm having a hard time imagining deploying a bullet-proof vest for self-defense. More specifically, I don't know of any public shooting incident where a victim could have successfully deployed their bullet-proof vest, unless the victim was either (1) wearing the vest already or (2) informed of the attack beforehand. Option 1 is not viable for me personally. For Option 2, I can spend my energy on not being there. Either way, I'd prefer to have the mobility instead of the vest.

I imagine the most likely scenario for successfully using a vest is in a home invasion. Even then, it's hard to imagine me putting on a vest every time I hear a bump in the night. I need to concentrate on many other things, like figuring out what exactly is happening, keeping my kid safe, identifying the intruder, calling the cops, recording the incident, making sure my gun is loaded, being quiet in order to hear, etc. Further, at home, I could set up a stationary barrier that would be quicker, easier, and more effective than a bullet-proof vest.