I got two slides in before I disagreed with everything. JIRA does not emphasize how over why. It literally just has a text box for a description. What you write

I got two slides in before I disagreed with everything. JIRA does not emphasize how over why. It literally just has a text box for a description. What you write is up to you. JIRA does not discourage in-person conversation. JIRA is there to document conversations and it's incredibly good at it. Any PM tool that doesn't allow threaded comments is dead to me. I've never spent more than like an hour training anyone on JIRA and have used it successfully for many, many years.