You mentioned that allowing somebody to have a larger vessel would enable them to catch more fish, but everybody has their own IQ, they have their own quota. If it's enforced properly and watched, dock monitoring or whatever, fishermen are only allowed to catch what their quota is, whether it's a daily limit, a weekly limit, or whether it's the quota for the season.
If I have a quota to catch 250,000 pounds of crab, whether I catch that in a 39'11" or a 65-footer, I'm still only allowed to catch that quota, so how can I catch more by having a bigger vessel?