I'm retired law enforcement. For three decades I moved around with firearms (multiple) locked, cocked, and ready to rock. No other way to do that. I'm not saying that is the way everyone should do it, but if gun safety is ingrained in your methodology, there won't be a problem. I pest in the back yard here, and never know when I will glance out the window and see something that needs leadifying. I have a springer and a PCP at the ready, and both are ready to slip the safety off and shoot. Granted, there are no children in my house, and when I have visitors, all guns go in the safe.
A secondary consideration is what is best for the gun. My springer is a nitrogen piston, and some have suggested that it should not be under load all the time. I disagree. Any vehicle with a hatchback has nitrogen pistons that help hold the hatch up. They are under load all the time. For years and years, and nothing bad happens. If your spring has an actual spring? Different story. It may retain memory if not properly designed. The springs in my handgun magazines are under load forever, but I'm not going to empty mags and reload them every time I come home then leave again. So far, the mags from my earliest semi's still retain their force, and I have never had a misfire because of them. As for the health of the PCP, I have not read anything that has made me think it needs to be uncocked when not in use.
Each of us must make our own decisions based on our gear, knowledge, and experience. Great topic for discussion, and I'm certainly open to hearing different viewpoints.