Enrichment, aka guest lecturers on Journey

We must choose between two ships with good port-intensive itineraries; one is Oceania Nautica & the other is Azamara Journey. We have not sailed either line before.

Our general priority for at-sea days and other free time is learning about the culture and history of the areas we are visiting, rather than casino, spa-pampering, etc. While we research and study ahead, there are always new insights or facts with good speakers!

But in checking the website for Azamara, I saw only vague allusions to enrichment but could not find details on guest lecturers for our sailings, as with Cunard. If the evening talks about the next day's port stop will simply be the ship staff subtly pushing unsold excursions, we'll be mightily annoyed.

What's been your experience with Azamara (or also Oceania, tho FYI, I am posting the same query on that board)?