I don’t know what to tell you, communication is complicated. A lot of this is subconscious.
and at the very least probably gonna cause unconscious bias to second language speakers, neurodivergent people & just anyone who doesn't communicate via text as much as we do
I agree, which is why it’s important for us to understand context and to attempt to interpret what the other person says in the best light.
I didn’t think my dad was actually being sarcastic when he replied that way. His text conveyed a tone he didn’t intend, just like when my neurodivergent ass says something in a tone of voice harsher than I intend.
This is no different from spoken communication, except there we get additional clues about neurodivergence and/or linguistic familiarity.