‘Going through the motions’ is guaranteed to lose your audience. Why should anyone invest time in listening to someone who has not invested sincerity and passion into a presentation?
Respect for your audience is key. If you say what you mean and mean what you say, you will connect with people. A good connection with the audience is something really special and worth working for.
To be blunt, my view is that if you cannot make a commitment to making some clear points with total sincerity you should turn down the assignment. Your reputation is at risk.