Colin,
I guess its a mind set ,30 years ago I was a fish killer,limit bags from the resers,sea trout from the dovey and salmon from scotland,not to mention the grayling beat owners insisted i killed on the chalk.
Last year I killed a single grafham fish ,ate it with enjoyment ,caught no salmon though had planned if fortunate to take one fresh cock fish from the Deveron ,should such a fish be caught.
I think its going fishing for me rather than the catch and eat !