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.

What if millennials are good at both and are choosing the right too for the job?

My boomer dad does more things on his phone than I do and I'm Gen X. It's actually astonishing how much he does on his iPhone. I'm dragging out the laptop and he's on his iPhone happy as a clam.

I used to be with ‘it’, but then they changed what ‘it’ was. Now what I’m with isn’t ‘it’ anymore and what’s ‘it’ seems weird and scary. It’ll happen to you!

that's kind of an ad hominem, but also beside the point: most bank apps (and websites) are actually absolute garbage, especially the top ones, just one example: the Citi app (on different phones) for a very long time refused to allow me to make a payment or change my password, so i had no choice but to use desktop. Somehow still, top banks' ugly websites seem to allow more functionality/fewer bugs than their mobile apps, which are very often just dumbed-down webviews or simplifications of their websites.