Just a personal anecdote. I have intense emotions when dealing with transphobia but I think I'm able to think clearly. I think there absolutely are times where intense emotions can cloud thoughts but I beleive the converse isn't true.
"Intense emotions can interfere with clear thinking" does not imply that "clear thinking is impossible when there are intense emotions"
I think it's because what they are saying is pretty solid. It's the exact solution I'd recommend