I have a presonus audio interface. It works 100% with my ipad pro and has for years. But if I have to take an ipad and an audio interface and and and then why d

I have a presonus audio interface. It works 100% with my ipad pro and has for years. But if I have to take an ipad and an audio interface and and and then why do I need an ipad at all? I could be using my laptop and have more options.