Ignoring the protective properties of good gear entirely because that can be argued forever and ever, I think good gear makes me more safe because it protects me from the environment. All of my gear carries with it features to help deal with the environment, not just the crash. Temperature control, waterproofing, protection from bugs and flying debris. I don't ride a fully faired bike that protects me from the wind and shit flying off cars, the road or bushes.
Getting hit with a rock, bug or other small object fucking hurts. Cold rain is chills you fast, rain on bare skin stings at speeds of 50+ mph. My full face helmet protects my face and eyes from random shit and the wind. Earplugs protect my hearing and let me focus better along with hear things other than roar of wind. Gloves keep my hands warm, good boots support my ankles, protect my feet and help me from slipping on the slippery shit all over the roads when I stop. Good pants protect my legs from debris, weather and heat off my bike.
All of those distractions would make riding much more challenging and take away from focus and the ability to deal with the random shit other drivers throw at me. Protecting me in the event of a crash is just bonus points after all that stuff.