Does anyone here routinely carry a few extra lbs of steel on a casual hike or are there other items that might have a higher probability of being useful -- how about a half gallon of water?
While I would not question the wisdom of carrying an extra half gallon of water, especially in your environment, I don't really have that need. Living in Minnesota - Land o' Lakes, I could probably squeeze a half gallon of water out of my socks if I really needed it.
I don't follow your math however, as a half gallon of water weighs over 4 pounds, and a Becker BK7 weighs 12.9 ounces. You would have to 'not' carry 5 BK7s to equal the weight of the extra water.
I do agree with you on the 'casual hike' comment. I don't bring a big knife into a county or state park.