@Helen,
It certainly DOES represent a lot of work, because those names aren't just pulled out of thin air, they are linked but, as I do, I'll add names to my tree with approx dates, or even just names, and then go back to do research when I have time to dedicate to just one person at a time and add the sources.
I use many sources, and set a specific number of people I will post into my tree then I stop adding and start researching but I never ever just pick a name and then see if I can link it to myself. That would be useless and a waste of time.
Giving me examples is just fine, but is not relevant to me at this time. I don't sit at my computer 24/7 typing in data aimlessly. This is my hobby as well as for many other folks. It's NOT a career, or a job. It's a hobby and something I do for pleasure. I get thrilled with history and have become a real history junkie but having someone beat me up because my source doesn't "fit the definition" is like telling an excited child their accomplishment for the day was worthless. My work is important to me. It's not worthless nor is the time I put into finding these names and then researching.
I have a reasonably large tree and it was built from good sites built by hardworking people. Just because I didn't stop and fill in the other blanks doesn't mean they didn't do years of work, or that I still HAVE years of work ahead of me.
Saying I didn't take time to build my tree is just plain wrong and rather arrogant, to be nice about it. I take the time (10 years so far) and my husband has done (30 years) enormous amounts of research and has original family books that I haven't even touched yet, so we ARE doing work, even with one name or a complete profile...If wikitree removed future sources for the me and others to find would be the worse move wikitree could ever do for the average person.
Wikitree can do as it wants... but removing profiles from an entire era would be an even worst move. Removing Charlemagne, Ceasar, and Ptolemy and other historic people (whether they have wikitree profiles or not) would be more than just wrong. They are history and can't be erased.
My choice would be easy if wikitree removed every name before 1400 without a source.