You seem extremely upset. I'm not disagreeing with you about cotton. OCTrojan asked about clothes for prepping, which to me means a lot of unseen circumstances. Don't we all carry ways to make fire in our prep kits? a lot of people get burned as well as wet, and wet you can remove clothes and dry, burned is burned. Anyway, I was thinking in more general terms, not just short term. Hypothermia is a killer and can happen in any climate, the point would be to avoid getting wet period. I know people who got hypothermic wearing synthetics as well (I worked Medevac in Alaska and Colorado, as well as in Afghanistan with the GI's wearing all synthetics). Prepping is preparing for anything.
I guess my point- your clothes need to protect you and be durable and comfortable. All have benefits and drawbacks.