What I responded to:
> The app is impossible to work with without a mouse.
It is, in fact, not.
I disagree that it's super difficult, but even if so, difficult is substantively different than impossible.
You, on the other hand, decided to pretend I said something I didn't so you could be indignant and tantrum at someone who... doesn't work on Slack and makes zero decisions about what to implement in the Slack app.
Alright. You are right, I re-read my reply to you, my tone indeed looks indignant (wasn't my intention), you haven't said anything that merits such tone, I apologize for that. But I stand by my words: Slack app is impossible to work with without a mouse for people with disabilities. The very first reply to my original comment confirms that.
People choose keyboard-centric workflows:
a) For efficiency (if it takes a few milliseconds to press a key, why would you even reach for the mouse?)
b) For accessibility
Your point is not helpful for any of these cases. Asking to try to use Slack App with a blindfold might be a bit extreme, what if I suggest you to try to use it for a few hours without touching the mouse? How's that for a challenge? Try that and maybe then you'd feel how it supposed "to get you there" for people with disabilities.