So much this. To get real work done (creative or not), you want a desktop OS and a big screen, keyboard and mouse.
Those tools may be good for some situations. But what about all the other situations? Some of the best art is created under adversity.
To be clear, the grocery line isn’t an adverse situation. But being in prison, working a physical / manual job, poverty—these are all adverse situations people face every day that prevent them from accessing the tools you mentioned, but I simply don’t believe they cannot or should not make art.