It's actually kind of a technical problem. You need to make morphs for 3 body parts every time. Then there is the setup to make them one dial. Now multiply this for all the breast sizes you want, because the existing morphs may cause weird tearing. It turns out to be harder than making a face morph in some ways.

Also, better quality body suits or cat suites have those built in, so people just use those instead of morphs.

If you start chopping models to make characters, you're more likely to make a composite model with only exposed skin showing through the catsuit.

And lastly... we all know 3D women prefer to be naked in temples with swords.

mo·nop·o·ly  [muh-nop-uh-lee]
noun, plural mo·nop·o·lies.
1. exclusive control of a commodity or service in a particular market,
or a control that makes possible the manipulation of prices