It's very easy to turn the smartphone into a reasonable creation tool, the trick is not act like the world ends at the bounds of the device.
Seeing smartphone software as the complete editing tool - in the mold of desktop software - isn't that interesting, creatively speaking. It's very precise to use software in that way, to emulate professional workflows from generations ago and create all sorts of shortcuts and configurations. But it only affects decision-making workflows in a limited sense, because what the precision mostly does is pull you down the road towards polishing your output more and more, making smaller and smaller edits with more and more layers. Why are you polishing it? If you exit the software and change mediums, you can actually accomplish more with less, because then you can just accept the limitations and finish. Software is often at its best with mixed media approaches where it supplements a few tasks with a light layer of edits, a data processing step, or a preliminary design iteration. But there are many traditional techniques and technologies that don't need it, or amount to "we strap some AI onto it to turn an imprecise machine into a precise one".
The consumption-device viewpoint of the phone is an invention of the software industry. The reality is that people are doing a lot of productive things just by turning the phone into a portable scanner or audio recorder. It's already the fastest way to grab references for most media. If you set up a Bluetooth keyboard and a stand, the small screen works fine for typing up run-once code to solve immediate problems. The things blocking creativity are a combination of the software ecosystem being unready to deprofessionalize itself and exit the industrialized "app" model(and it is unready - we have a lot of maturation to do still to automate programmers out of their jobs), and the atmosphere of social media to engage in rat races for likes and follows, which is caused through incoherent models of assigning credit and blame, poor mechanisms of identity management, etc.