Clarification on installing @testing-library/dom

[denchen]

In the @testing-library/user-event docs, it states:

If you use one of the framework wrappers, it is important that @testing-library/dom is resolved to the same installation required by the framework wrapper of your choice.
Usually this means that if you use one of the framework wrappers, you should not add @testing-library/dom to your project dependencies.

But then in the @testing-library/react docs, it has:

npm install --save-dev @testing-library/react @testing-library/dom

So is there a disconnect here? @testing-library/user-event tells me not to have @testing-library/dom in my dependencies, whereas @testing-library/react has me add it.