Agreed. Calculators in general, yes. The Calculator app on my PC, not so much. I’d also assume people using calculators that much would buy a physical one, it’s much more convinient.
I have a calculator button on my keyboard right above the ten-key. When I push it it opens my calculator app or brings it to foreground if it's already open. I consider it extremely convenient since I find I need a calculator often, but not often enough to justify leaving one always on my desk. Also I can copy and paste answers/intermediary results easily and it does conversions automagically (e.g. "5 cups in ounces").
Physical calculator? You mean a phone right? or just Googling the equation? or saying okay google and asking the equation to your phone so you can just say the words billion and not type like 9 fucking zeroes or something?, or use desmos? or wolframalpha?
A phone is in almost all regards worse than using a calculator with actual buttons. Voice is even less efficient. The major reason to use a physical calculator at your desk is because it's a dedicated device that's always ready, and fast. Anecdotally, being able to use it efficiently one-handed also plays a role.
