Is this conversation real?
Go look at any of the excellent BBC clips from races in the 1980s!! Cars were fueled and tyred for the whole race, there were no radios, wings fell off, cars had no crash or crumple zones, pits were open to the race track... The drivers had to slow down because they ran out of brakes, tyres or fuel. Sure, there were good battles, but most were resolved by one driver or the other running low on fuel, brakes or tyres long before the chequered flag. If what you want is a return to that era, then go watch Historic F1 at any British race circuit.
The 'radio for safety' argument is a red herring. If it's that critical, teams can either send a signal to the car, or shut down the engine from the pits, through the telemetry. We have what we have, and it is going to get more complex, not less.