In the “startup” world, this is simply the only way to do it when your goals are to be everyone’s service. Banks rarely create open APIs, and even when they do they are fragile and subject to whims as the banks are optimizing for security first (plus: they need strong incentives to maintain APIs since it’s not even in their core business).

And since you can’t rely on an API, “there’s no other option” which compounds with the fact that coding up a web scraper for a specific bank takes maybe a dozen programmer-hours. Then throw on a disclaimer to cover legal, and start counting your billions of unhatched eggs.