As others have mentioned, it seems the opposing viewpoints in this thread represent how different people respond to the same set of facts.
On one hand, some see the conversations about the slowed ceremorphosis process as a sign that we have less to worry about. Since it seems to be happening more slowly, perhaps we can also take more time in figuring things out. The more normalized it is to see other infected humanoids staying the same, the more inclined we are to assume that care is more valuable than haste when it comes to solving our ailment. The disease appears to be complex and mysterious, without causing harm to the many hosts we are encountering. We might as well take this gift of an opportunity to solve things carefully, while we have time. If we rush from potential solution to solution, we might miss the hidden details that could actually give us a chance at solving this puzzle. *Spoiler* Considering we come up with three different leads on a cure upon reaching the druid grove (ethel, halsin/nettie, gith at risen road), it is going to take time to thoroughly check all three.
On the other hand, having NPCs tell you that the change isn't happening as quickly, and the process appears to be slowed, doesn't necessarily mean the risk of changing is no longer there. And since we don't know why the process has slowed, we don't know if that could be reversed at any given point in time. *Spoiler* Especially when we saw an infected human get turned into a mindflayer in an instant on the nautiloid, with just the push of a button. Even if we assume the tadpole is altered enough so that we won't progress in the ceremorphosis process naturally, we don't know whether our enemies have a mechanism to turn us at remotely, at-will, and what might cause them to make that decision. So under that logic, it is best to focus on removing the tadpole ASAP, regardless of how quickly the tadpole is developing, because every minute it remains in our head is another moment that we remain vulnerable to the unknown. Under this assumption, we don't have the luxury of time to learn everything we can, but rather we need to choose our best lead, and get there fast.
I don't think either approach is "wrong", I have my preference, but both views are based on logic. Seeing as Larian wants to "be your DM", the game will do best if it can feel responsive to different takes on the story, because different parties are inclined to have different views on the best course of action.
