Cardiac arrest is an incredibly heterogenous condition. A witnessed VF arrest in a young person with an inherited electrical type heart condition who gets compressions and a shock on a gym basketball court can wake up and walk away normal. A 98 year old who codes from sepsis or a fentanyl OD who is profoundly hypoxic or acidemic who gets enough Narcan and CPR to start having a heartbeat again after 15 minutes is very different. The statistics reflect this but you can’t generalize from the general to the specific in this case.