I'd love to know the kind of phone you're using where the voice commands are faster than touchscreen navigation.
Most of the practical day to day tasks on the Androids I've used are 5-10 taps away from a lock screen, and get far less dirty looks from those around me.
1 unlock the phone - easy, but takes an active swipe
2 go to the clock app - i might not have been on the home screen, maybe a swipe or two to get there
3 set the timer to what I want - and here it COMPLETELY falls down, since it probably is showing how long the last timer I set was, and if that's not what I want, I have to fiddle with it.
If I do it with my voice I don't even have to look away from what I'm currently doing. AND I can say "90 seconds" or "10 minutes" or "3 hours" or even (at least on an iPhone) "set a timer for 3PM" and it will set it to what I say without me having to select numbers on a touchscreen.
And 95% of the time there's nobody around who's gonna give me a dirty look for it.
and less mental overhead. Go to the home screen, find the clock app, go to the alarm tab, set the time, set the label, turn it on, get annoyed by the number of alarms that are there that I should delete so there isn't a million of them. Or just ask Siri to do it.
One thing people forget is that if you do it by hand you can do it even when people are listening, or when it’s loud. Meaning its working more reliable. And in your brain you only have to store one execution instead of two. So I usually prefer the more reliable approach.
I don’t know any people that do Siri except the people that have really bad eyes