Dictation over typing is superior in some cases.
I have these cases on a regular basis:
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Leaving the kitchen and telling Siri to set the time to 10 minutes.
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Walking from X to Y or steering a car and telling Siri to take a note, create a reminder, etc
It would be impossible to this with typing on any keyboard, hard or soft. The technology works well enough for me to use it (otherwise I’d drop it like a stone) and can be expected to work better.