Why are Fisherman Required to Use Barbless Hooks?

I'm trying to become an ethical fisherman. I hooked this guy through

5 Reasons EVERY ANGLER Should Use Barbless Hooks

Department of Land and Natural Resources

OROOTL Barbless Fishing Hooks, 180pcs Carp Fishing

Barbless Hooks: Why Use Barbless Hooks & How To Make Your Hooks

Barbed or Barbless Fishing Hooks

Barbless Hooks — Keep Fish Wet

Barbless Hooks Increase Your Catch Trout Fishing in the Smoky

Hooking injuries taking toll on North Platte fishing - WyoFile

Why Barbless Is Best - Game On! LLC