I have an iPad Pro and a MacBook Air and love them both. To a degree the two are interchangeable. I can surf the ,Internet handle email, write proposals and develop curriculum for my classes. I can edit photos, record and edit small videos, and do limited programming. Note that the last two items had qualifiers - small and limited. There are things that I cannot do on my iPad that I have to turn to my desktop or notebook to do. Some probably won’t affect you - like programming. But others might.
One big difference between the two involves workflows. Multitasking - using multiple programs - is much easier on the Mac. On my desktop I can grab a photo from my library, edit it, and then drop it right into the document I’m working on. It isn’t quite that easy on an iPad. However the iPad is enough of a full powered computer that I often travel with it and a keyboard instead of my MB and if you think about it, that’s rather amazing. 25 years ago I bought a notebook because I needed something portable, and now there’s something even more portable than the notebook that can do most of what the notebook can do. And that’s where I was 25 years ago when my first notebook could do most of what my desktop could, but not all.