I have never had a poppet fail. Occasionally get crud in them, yes; but, never actually fail. They aren't cheap, so unless you can definitely see that one is cut, scored, decomposing or the spring is broken/rusty, just clean and lube it.
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
"I would like to die on Mars, just not on impact." Elon Musk