Not sure if that was a rhetorical question and/or whether i will be doing it any justice but here is my understanding of it. Typically writing by hand is more involved/complex (i.e. more timely and less automatic) than typing. This engages not only the sensorimotor system differently but also conscious attention - which fires up synapses in specific areas of the brain. When the content is imbued with meaning or feeling, this yet further engages the ‘emotional’ brain. It’s a bit like the equivalent of verbal catharsis described by early psychoanalytic practitioners.

You know, like talking something to death (provided anyone is receptive enough to listen that is!) might help lessen its emotional impact. Likewise, ‘writing it to death’ might help blunt the emotional edges.

Anyway, not sure if this makes sense and might be worth asking T to do a better job!

Not saying it works for everyone but from personal experience, it does help me at times.