Touchscreens aren't Accessible for All, and External Controllers aren't a Solution

I have proprioceptive issues, so it's hard to use touchscreens without triggering unwanted gestures. And zooming animation can trigger unwanted migraines. I can't use phones, but touchscreens are also common among tablets, e-readers, and even pharmacy checkouts.

I have tried using the Ipega 9023 as an external controller for certain tablets. It doesn't work as an accessibility tool. I have to start the device and use the touchscreen to establish the bluetooth connection to the controller. And it's very hard to establish any working connection.

I think, for external controllers to become a solution, they will need physical connections to the devices, rather than unreliable bluetooth connections, they will need to work while loading, rather than after loading and using the touchscreen to establish a connection, and they will need to be able to work for all functions. A couple extra ports for accessibility tools would help. I also think operating systems should stop hammering their users with animation. Android has dev tools to disable animation, but they don't actually disable animation.