You're missing out on what I believe to be the most killer use of Siri that should be in every marketing video: outsource your short/medium term memory to it. I'm guessing Google's assistant can do this too. It's not particularly advanced but needs a physical device you pick up all day to work:

"Siri, remind me to lookup that form for the tax guy tomorrow at 10am"

"Siri, remind me in an hour to order more dog food"

"Siri, remind me in 3 months to cancel the trial for X subscription"

I just hold the side button, dictate the fleeting thought, and move on. No unlock, nothing to type, no navigating a time picker. Eventually it'll pop up and I'll be happy because I absolutely forgot X task already, and it'll stay as a notification on my Lock Screen until I do something with it. Often times I just pick an arbitrary time and get to it eventually that day, and then I'll dismiss it. I can also snooze for a later time period with a long press, etc.

This is so integrated into my life I literally cannot imagine not having this ability. I'd forget things all the time.