Good hon grad speech from a climate specialist at the Met Office, talked about mis/disinformation, tribes, & polarisation, and the value of disagreement in finding agreement. In considering "Who to trust?", she wisely suggested that those who are able to admit they were wrong and change their view are the ones to trust more than those who just stick to their tribe's position.
Hon grad speeches vary enormously. Just occasionally there's a great one, using personal experience to get something thought-provoking across, but they are few and far between: most are generically decent and 'worthy', and occasionally they are dire (such as the one by Damon Albarn, whose 'speech' lasted about one minute, and had had less preparation than that).