Nobody bought the Light Phone to escape the dopamine drip of Calculator.
My three year old and I actually had a lot of fun with the Calculator app on my phone just a couple hours ago. He thought that me reading off large numbers was hilarious.
So, yeah, Calculator is a pretty important feature.
I read that Nintendo invented the "Game & Watch" games (pre-dating the GameBoy) after an engineer watched a businessman on a train entertaining himself by playing with a calculator.
For the original, maybe. This second edition was supposed to hit a sweet spot of no distractions, but enough features to live a normal modern life (ex: maps), and have a shot at being your main phone.