Piracy is a bigger problem on Windows and Mac, but they thrive. Besides people don't tend to pirate things that are reasonably priced.
Fragmentation was an issue maybe 5 years ago. The latest versions of Android will be able to run this. Fragmentation happens with hardware reliant features, like a camera app trying to work with every manufacturers proprietary cameras. This software would rely on OS integration, not manufacturer specific hardware.
I'd suggest that if YOU want to properly run pro software on a tablet, get a Microsoft Surface Pro over an iPad Pro. Are we still doing the Apple superiority condescending "advice" to people? Geesh.