I respect your views. And I disagree 100%. And it has nothing to do with detecting some pending equipment failure. I am 76, have operated chain saws, guns and tractors, ....guns and tractors since I was 12. And done a fair amount of ground hog hunting with a high powered rifle and close up with a shotgun. I will match my hearing against anyone --
I have very thankfully EXCELLENT hearing. And I never used an ear plug. [In retrospect I do recommend ear plugs for high noise level
repetitive shooting like skeet and doing a large number of rounds of target practice with large bore weapons. That is about the only case.] Meanwhile I have seen bikers and people operating all kinds of machinery foolishly risking life and limb,
unable to have reasonable situational awareness of what is going on around them due to ear buds and various forms of something stuffed in their ears. For another example, people walking, (almost always youngsters...) have to be yelled at when approached from the rear on a bike. These people are frankly stupid, just asking to be injured. Irresponsible.
So there is difference of opinion, not unanimous. I suggest looking at noise level standards and "what noise levels for how long an exposure" are considered harmful to your hearing by experts. [I'm the first to question 'experts' but at least they have data, studies, and decades of experience...] The Center for Disease Control (CDC) posts an informative set of info at
What Noises Cause Hearing Loss? | NCEH | CDC
Sound levels above about 100dB can damage hearing BUT
it takes a lot longer for lower levels to cause damage than for high levels like firecrackers. Sound level meters standardized for the profile in spectrum of human hearing are readily available. If you are truly serious, thinking you need to protect your hearing using a tractor, invest in a sound level meter and see for yourself. I do not think there is any hearing threat reason to wear ear coverings on a farm tractor. I firmly believe you put yourself in harms way doing it.
Each of us of course does what we think is best...