It could again be the concept of pressure that your subconscious mind could be telling you that so many things are at stake here (they're really not) if you fail to smoothly tell Siri to set your alarm clock, but that's honestly just my theory. I also wish at times there was a tablet to never stuttering again for the future but who knows. The most stutterers can do is change the mindset of society to spread awareness to just be patient and kind to us.