I would never argue the use of personal protection equipment (PPE), but sometimes common sense and good ole experience can trump the necessity of too much of it. I generally always wear ear protection, gloves and eye protection if I am using any sort of loud cutting equipment. I've been using my chainsaw for 30+ years and have yet to try on a pair of chaps. I will tell you that years ago I nicked my thigh once with the chainsaw, but again, that was due to lack of common sense on my part, I just wasn't focusing enough. I was just standing and looking at where I was going to make my next cut and let the spinning saw rest on my thigh. STUPID!
It's my personal choice not to wear chaps, not because I don't think they are a good idea, they are. But because I feel comfortable now that I can avoid making the same mistake, and I only cut a certain amount of wood every year so I'm willing to accept the low risk. If I was using my saw everyday, I'd probably change my mind.
I do make sure I wear ear and eye protection though, because there is simply no way to avoid the harm that loud equipment with flying bits of wood and sawdust does to your eyes and ears. That is where the common sense comes in.
Wearing chaps is like wearing a seat belt, is it smart to wear them? You bet! Do I always wear a seat belt? I usually do when I'm in my car (it's the law after all),,,,,,,, but I don't when I'm riding my motorcycle.
Disclaimer (Kids, don't try this at home)