As someone who was recently Intro certified, and has done a few guided dives slightly above the Intro level since, I just want to chime in and say that this was a valuable experience for me.
I got my Cavern / Intro Cave cert this winter in Playa del Carmen, and now had a few days over spring break for diving. My buddy from the cave course was unavailable, so I decided to go back to Playa to do a few guided dives with my instructor from the intro course. We decided that we would set the turn pressure between sixth and thirds, so that I get to experience longer dives and see more of the caves. And, that we would not turn the dive when we come across a temporary T that is created when someone else ties a jump into the main line, but properly cookie it and continue our dive. And the latter was a very good thing, as we reached such a T just 200 ft. in on our first dive. If I hadn't been with an instructor, I would have had to turn my dive right there (talk about a temptation to break the rules if I had been on my own...) Now with the instructor, I got to see a few of these very simple navigational procedures for real, and overall got more cave time in. I was very happy with how this went, and felt comfortable at all times. In fact what made me the most uncomfortable was something still within the rules for Intro: "almost Ts", where a line into a side tunnel ends sometimes less than a foot away from the main line. Easy to accidentally jump if you don't pay attention. Having a guide was definitely reassuring. Yet, none of the dives were trust-me dives - had my instructor just vanished, I would have found my way out safely even if one more thing, like blown visibility or a free flow, had gone wrong.
I prefer doing a few dives like that before going on to taking the full cave course. It makes sense for me to build some experience that way, not to mention it allows me to make some fun cave dives without having to worry about a buddy. And I will probably do a few more of these (and do AN/DP) before taking the full cave course.