Taking your firearms for a walk works just fine in some terrain and for some species and hunting styles, at other times, you need to have a firearm that is ready to shoot on an instant. Debating whether or not you should hunt hot or cold is too situational to be anything but foolishness. If you follow the cardinal rules of firearm safety, it doesn't matter if you hunt hot or cold. Negligent discharges that result it deaths along with any number of other fatal hunting accidents are 100% the result of breaking one or more of the cardinal rules.