Nuts, a hypothetical to consider.
You go for your solo walk and break a leg, sprain a ankle very badly etc, something that isnt actually going to kill you but you are going to take awhile to get out if at all.
Next thing you are overdue and like all responsible walkers you have left you plans with a responsible person. You're overdue so your contact raises the alarm but you didnt plan on going up that spur to get a magnificent sun set.
Who goes out to look for you? A couple of police officers(paid) and alot of volunteers who give up their spare time for these sort of scenarios. If you had a PLB and set it off they would walk straight to you or they might not even be activated as the chopper could fly right to you.
I have spent alot of time bashing the scrub because people (suicides) decided to go into the bush to kill themselves. After doing line searches for a couple of days you will soon think about the people who come looking for you if you have an accident and make it easy as possible for them.
Carry a PLB it might save your life and it will make searchers lives alot easier even if you dont care about your own life.
I think of a GPS like a calculator, it makes navigation easier. You still should know how to add/subtract etc same as you should know how to read a map and use a compass.
I prefer to keep the GPS in my pack and use a compass and map, I get alot of satisfaction from succefully navigating to my destination( is that a man think ie not wanting to ask directions from a GPS). If I can I prefer to just use map to ground.
Roger