I know this is true, but for serious tasks, I need the screen real estate. I'm amazed at what some people can do from a phone, but also wonder if they're missing things, of if it's actually inefficient.
I wouldn't call checking a bank balance and initiating transfers "serious tasks". Maybe important but they aren't complex.
What "serious" tasks does banking involve?
I log in to transfer money, to take a photo of a check to deposit it, to check my balance.
All of that is fine on a phone screen. Actually, it's a lot easier to take the check photo.
And a banking app is a whole lot more secure than a browser tab running extensions that might get hijacked, on a desktop OS whose architecture allows this like widespread disk access, keyloggers, etc.
The efficiency of being able to do something at a moment's notice, on the go, anywhere and anytime may outweigh the conveniences of a larger screen.
BTW newer mobile phones offer "desktop mode" (the Samsung Dex, and what came to AOSP), so you can attach them to a TV.
I am going to guess you are 30 or older. Google image search "laptop tasks millennial" to see that this is a feeling shared among our cohort but not the younger cohort.
Or if they go to the public library when those tasks come up.
Do you need it, or do you just feel more comfortable with it?
I'm going to bet that you are a millennial or older? We need our big screens for $IMPORTANT work (buying big things, money stuff, etc.). GenZ tends to be less bothered by it and just does it all on the tiny screen in their pocket. It's time to schedule a colonoscopy.