If I can use something else I will. Phones are small enough there really isn't a better alternative to a mouse, but I would still rather have a physical keyboard than a touch keyboard. On laptops with touch pads I always connect a mouse. If it's a laptop or desktop with a touch screen, the last thing I want touching the screen is my greasy fingers. I have a mechanical keyboard and gaming mouse for a reason. They are superior input devices.
If I can use something else I will. Phones are small enough there really isn't a better alternative to a mouse, but I would still rather have a physical keyboard than a touch keyboard. On laptops with touch pads I always connect a mouse. If it's a laptop or desktop with a touch screen, the last thing I want touching the screen is my greasy fingers. I have a mechanical keyboard and gaming mouse for a reason. They are superior input devices.