Thats a good point, but its no better than just using the PowerPoint app on your iPad.
I used the iPad for work, almost exclusively, for years.
At first, it was almost impossible, but now the iPad really is a very capable computer.

Microsoft
The trouble is, multi-app support feels tacked on.
Perhaps one of the apps doesnt support drag-and-drop.
Or perhaps it does, but only inside the app itself.

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Or maybe its supposed to work, and the iPad just isnt feeling it today.
Its up to developers to implement it, and if they dont want to, it wont work.
Now, the Office app does support drag and drop from other apps.
you might still drop images into your documents from the Photos app, for example.
Having an integrated suite reduces inefficiencies for accessing data and for collaborating.
There are some other advantages to a suite.
For instance, you could easily create and sign PDFs from your documents.
In one way, the iPad is now a more viable laptop replacement than ever.
Hardware-wise, its already more powerful than many laptop computers.
It even lets you hook up a keyboard and a trackpad.
But in other ways, the iPad still feels half-finished, most obviously in the interaction between apps.
But if all you want is Office, then now youre golden.