They’re not. F-15 bases have wires at the end of the runways (not good to lose the brakes and go off the end of the runway and into the trees).
They are able to withstand arrested landings. I’ve personally witnessed many of these on the approach end of the runway, some in excess of 160 knots. They will use the approach end cable which is usually about 1500’ from the runway threshold when they have in-flight problem such as hydraulic failure or an unsafe landing gear indication.