Once a week I do this. It's far from worthless. It's how I do my budget. Ever dollar earned goes into a spending category. I spend out of the categories. It works amazingly well. Before I had a mortgage I just had 11 bank accounts one for each category. That paired with a stack of automatic payments to allocate each pay check and had pretty well automated my budget.
Well, worthless is a strong word, it's better than nothing as it saves you typing. But having programmatic access to that data - even being able to skip the auth - would enable series of different usecases, like keeping the budget always in sync with your spending, or being able to preview your last activity conveniently, or trigger further actions on the basis of that, or just make a banking frontend that doesn't suck.
(Case in point: every month I have to send a bunch of PDFs with transaction details to my accountant; every month I waste almost an hour, a really frustrating hour, on fighting my bank's broken React SPA, and then manually renaming the PDFs I've managed to tear from the mouth of that beast. An hour on doing things that would take 30 seconds with a shell script if I could only trigger a list of transactions and a PDF summary request via an API. An hour on manually doing the only thing that's preventing me from completely automating away my regular interactions with the accountant.)
