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They're more dangerous because the blades are attached directly to a heavy flywheel. That accident was unusual because the motor was running when it happened; usually shit goes wrong after the operator hits the off button and the blade is running down. Also worth noting that generally European machines have a different type of guard that does not return automatically - the idea being that as it becomes automatic to return the guard to safe and because it's a process you have to follow you know the machine is returned to a safe state and also once the guard is in place it can't be pushed out of the way accidentally.
Horrendous. But I’ve used a planer and it seems safer than a table saw to me. Except for the fact perhaps that you can’t easily tell when it’s running.