It seems like your criticism is that writing a character repeatedly doesn't help you recall which characters to use for a given word, with which I'll heartily agree – practice doesn't tend to make you better at things you aren't practicing.
But that's not what writing drills are about in the first place. Keep in mind native speakers are already advanced users of the spoken language by the time they're beginning to read and write, and the mechanical task of writing (just putting down the right strokes in the right order) requires relatively more effort. That's what the writing drills are supposed to help practice, and I think they work just fine for that purpose.
If you create flashcards that just show you a character and your task is to recreate it on paper, you may find that writing it repeatedly instead of just once helps you do better tomorrow. (Just at this task, which you may not care about much.)
Similarly, if you review your definition/pronunciation → character flashcards multiple times on the same day (e.g. in Anki by choosing "again" or "hard" for new cards, or by using the "cram" feature) you should be more likely to remember tomorrow. (This might also not be something you care about, unless you have an important test tomorrow – which is probably what Anki supports "cramming" for.)