Giving up control isn't easy, particularly when it's your money that's invested. That said, successful investors such as Y-Combinator do invest in people rather than a particular idea.
I imagine VCs want to own the rights so they can pull the plug if something unexpected happens, like a founder has a major life event or something. Whether or not they limit themselves to only pulling strings in the most dire circumstances is another question.
I imagine VCs want to own the rights so they can pull the plug if something unexpected happens, like a founder has a major life event or something. Whether or not they limit themselves to only pulling strings in the most dire circumstances is another question.