I mean, I do it. My 350 Legend, suppressed, shooting 180grain Winchester Power Points which are 2100fps. Out in the woods, I barely notice that I shot. It is leaps and bounds better then shooting, say, a 300WSM in the woods without ear pro.Yes. I suppose in a hunting scenario where you wait and wait and then just take two shots, you might be able to get by w/o ear pro.
But would I sit somewhere and shoot a 20-30 rounds without ear pro? Absolutely not. While I'm getting away with that one or two shots in the woods, any more than that would cause hearing damage without a doubt. Hell I'm sure maybe even that one shot is causing some damage but it's the risk I take.