What exactly is your point? That banks aren’t advanced enough?
Last time I checked there are already tons of apps for banking use cases. I use a third party budgeting app across multiple accounts. For my European bank account I use a third party tool to wire money. During my time as a freelancer I used tools that fetched my transactions, automatically categorized it and gave my accountant access to it to prepare my taxes.
What use case do you want to build that can’t be build on top of an API?
Last time I checked there are already tons of apps for banking use cases. I use a third party budgeting app across multiple accounts. For my European bank account I use a third party tool to wire money. During my time as a freelancer I used tools that fetched my transactions, automatically categorized it and gave my accountant access to it to prepare my taxes.
What use case do you want to build that can’t be build on top of an API?