I wouldn't say the show "glorifies" the practice. I'm not sure I've ever really noticed that they had guards or didn't. It's not as if they are taking air time to show the knife maker removing the guard and throwing it the scrap bin.
Industrial safety is all well and good, but then there's the real world. If you're relying solely on a machine guard to keep you safe, chances are high that you're going to get hurt with or without it. If you use the safety guard between your ears however, the chances of going home the way you came in, rise exponentially.
Don't get me wrong: I think good safety habits and practices should be encouraged, and guards should be used when possible, but I also thing that the typical industrial safety engineer's attitude of "if we install enough rails, guards, safety interlocks, decals, hirac forms, etc..., nobody will ever get hurt again!" is not only naive, but misses the main issue: not so common sense/thinking and paying attention to what you're doing.
At any rate, I think I bigger safety issue they need to address is keeping the contestants cool and hydrated. Those dinky little thermos bottles look like they only hold about one bottle of water, and why are all the forges facing each other? Stagger them or turn them away from each other.