Learning handwriting analysis trains you to slow down and actually look. That habit spills into the rest of life, in the way you read faces, spaces and situations.
It also gives you a private tool for reflection. Your own writing shifts with mood, sleep and stress, and noticing that is a gentle form of self-awareness.
Finally, it builds empathy. When you understand that a heavy hand or a tiny signature is a signal, not a flaw, you meet people with a little more patience.