The entertainment value of watching others is priceless. Since there can be no doubt that I have provided more than my share for others over the years I have no problem politely enjoying watching the CG set up show. When we were boaters it was the "Watch the new folks anchor show" and on holiday weekends nothing beat the afternoon retrieval show at the boat ramp.
Unless I see someone who is about to do damage or injury or is looking around seeking help I usually reframe from rushing over but no one has ever had to ask me twice for assistance. :C