What are the disadvantages of mobile phone handwriting?

Calligraphy is good and bad. Personally, I think handwriting does more harm than good. For example, the recognition rate is very low and the technology is not high; Touchpad is easy to wear and difficult to match, and the recognition rate of protective film is lower; Some mobile phones only support handwriting, so it is inconvenient to send text messages; Because it is more emotional, it is easy to press the wrong button without a keyboard lock, and it is even more difficult to unlock it. "Ha, that's exactly what I thought." You buy a touch screen with buttons. IPHON is also a touch screen, but that's more mature///