Yes, true.
But if you're only wanting to animate a head, ie: mouth, eyes, expressions, ears, hair and stuff like that, then you won't actually need any bones. Morph targets are ideal.
But as ENSONIQ5 has said, if you want to animate arms, legs, torso bend and so-on, you'll need to use bones.
But as far as morphs go, they're brilliant. There are some morphing tutorials around, and i'm 99% finished part 1 and 2 of a more detailed one. (maybe another week tops.).
I made this one below, (link), 3 or 4 years ago. A little silly, but does explain some morphing and anim8ing basics.
Keep an eye on the works in Progress forum. I'll be posting the new one there when its done.
Good luck.
(Please feel free to ask any questions regarding robot tut. )