I see these practice techniques as nice, free or low-cost exercises you can use on your own. Of course they are not the same thing as having direct experiences with native speakers (having a conversation with them, or having them read and correct a text you wrote), but they are still useful.
They might seem silly, but I do see a point, especially with the read-aloud method. Musicians and athletes often talk about muscle memory, and I believe the same idea also applies to language learning, especially when learning to speak a language with a different set of sounds or sense of rhythm. In this case, using a combination of native text + corresponding audio to practice reading aloud and shadowing could be helpful.