Very sensible, and it makes a huge difference. I was brought up and still live on a farm (not a working farm anymore though). I always wore ear defenders when operating noisy machinery like tractors without cabs, chainsaws etc. and my hearing is, I like to think, very good still. My father on the other hand never did and has been wearing hearing aids for the last 20 years.
Even with the h. aids his hearing is still pretty bad so he misses large parts of conversations, and his tv is so loud it makes our ears bleed! It's also really annoying having to repeat things for him all the time when it could have been avoided.