Let no one forget that Winston is a sentimental softy who
* other members of ex-overwatch frequently sent cards and pictures to which he held on to and stuck to his wall
* had a mental breakdown when the glasses of the man he cared most about were destroyed
* referred to the disbanding of Overwatch as a ripping apart of their family
And he is too good and too pure and should definitely probably not be involved in a war where his ‘family’ stand a very real chance of possibly dying.
Like, I want everyone in overwatch to focus exclusively on invention and scientific discovery and peaceful aid just so that Winston never has to be hurt again.