Scholars are deeply gratified when their ideas catch on. And they are even more gratified when their ideas make a difference - improving motivation, innovation, or productivity, for example. But popularity has a price: people sometimes distort ideas and, therefore, fail to reap their benefits.
So when you do your family tree and Margaret Cho does hers, and... Wanda Sykes and John Legend... we're adding to the database that scholars can then draw from to generalize about the complexity of the American experience. And that's the contribution that family trees make to broader scholarship.
As for pupils, I can have as many as I choose, but I do not choose to take many. I intend to be better paid than others, and so I wish to have fewer scholars. It is advisable to hang back a little at first, or it is all over with you, and you must pursue the common highway with the rest.
Art historians agree that Da Vinci's paintings contain hidden levels of meaning that go well beneath the surface of the paint. Many scholars believe his work intentionally provides clues to a powerful secret... a secret that remains protected to this day by a clandestine brotherhood of which Da Vinci was a member.