You're right, there isn'y.
No one should stick up for the planes. They, as well as everything mechanical, can be replaced.
A life cannot. Every pilot knows the risk, but that does not make his life worth less than the airplane.
Try telling that to his family, or his friends. Try telling that to anyone who has been killed in a vintage plane crash since the war ended. These aircraft, no matter how valuble or rare, are just machines. They're just tools used to accomplish something. The pilot's life is not worth less than that.
Every last warbird WILL eventually be destroyed by time itself. No matter where it is, airborne or not, time will destroy every single one. You're not going to gain anything by hangering them for all time.
And there's far less damn good pilots than there are vintage aircraft.