We are concerned about security in a couple of very important forms. We want to be safe in our homes and vehicles. We want to be free of intruders (unauthorized people with sinister intentions) or anything (foreign objects, wind, rain, or other weather) that might penetrate the environment where we are at the time.
We also want to be safe from falls, trips, stumbles, cuts, burns, and anything else that might happen to us in our homes, including objects falling on us from a higher shelf, objects breaking while we are handling them of attempting to use them, and anything (particularly electrical or mechanical items) that can be used improperly and cause discomfort or injury.
As we get older, security and safety (they are so inter-related) become much more important. When we fall, it's harder to get back up and keep going. We aren't as flexible as we used to be. Bumps and bruises take longer to heal. We also are concerned about our ability to deal with challenges, threats, and danger. At a much younger age, nothing much bothered us. Now it does - and not just us, but many other people who aren't so young anymore.