I suppose that's it.
Although, I still don't see where some of your examples of who you think are cruisers differ from the sailing that you and I do occasionally. If I understand Gary and WingnWing, their cruises were just like ours, only longer. I leave each year with no specific plan, no reservations, fully self sufficient and nothing more than a region in mind with a bookmarks on anchorages we might use. We pick which it will be over coffee each morning. I only have a date when I must be back. Wouldn't that be exactly the same as the examples you gave, only theirs was longer? Our date is weeks away, theirs is months.
I'm beginning to wonder if some think the term cruiser is a badge of honor that must be earned or one must qualify for. I would personally find that silly. I also wonder if some think a cruiser has to fit a stereotype. Did that investment banker who cruised the Pacific on his $5mm 60ft GunBoat with satellite comm qualify? One is a cruiser whenever they are cruising (whatever cruising is, I guess). It doesn't charge my batteries to think that I am or am not a cruiser at any given time. JMO.
We are all sailors. What he do while sailing defines if there are or not any purpose associated with the pleasure of sailing.
I don't see why someone that uses the boat mainly for cruising while sailing has a badge of honor over a guy that uses the boat for voyaging or for training and racing or one that just uses the boat for....sailing without any other purpose.
Cruising is not only associated with sailing, you can cruise on a motorcycle, on a car a caravan a canoe or even on a bicycle. That is something that can be associated with a sailing boat or not even if a sailing boat is great for cruising.
I even have cruised on mountains with a dirt bike, using military maps, for thousands of km. Probably a not very common way of cruising but I loved the wilderness and the pleasure of cruising in a world that is rapidly disappearing, the one where very rarely you would find a soul all day but where you would be surrounded by wild animals and untouched nature.
Cruisers or racers, don't have to do it all the time, they do it when they can and some have not much time out of work. It is the way they use the sailboat that defines if they are cruisers or not, independently of the time they use it. You can even be a cruiser with charter boats.
You don't have to be a professional racer to be a racer: That depends on the purpose you use the sailboat (besides sailing). The same thing with cruisers.