They're often interesting, but they're fairly anodyne: a famous author talking about their recent book, a CEO talking about their successes or new focus on sustainability/diversity/etc, some broad perspective on current events. You can see how Goldman folks might benefit a little bit from knowing about (say) the likely timeline for vaccine roll-outs, but you could get much of the same info from an hour of NPR.

However, meeting the person seems like a nice perk or recruiting/marketing tool.