Here in Brazil, many banks require the use of an invasive "security" browser plugin to access your bank account through the browser, and that plugin obviously exists only for desktop browsers. And it's also not uncommon to require a confirmation through the phone app whenever doing a transaction through the web.
The root cause is malware. Intercepting the online banking session in the desktop browser to steal your money used to be very common.
The root cause is malware. Intercepting the online banking session in the desktop browser to steal your money used to be very common.