So, I might have changed my opinion a bit during recent playthrough - not whole 180d., but closer to 90d.. I don't think it's great, but it's not as big of a problem then I thought it was, or it used to be (for couple patches now I have been mostly skipping dialogue, so it is difficult for me to gauge how has the writing developed.

Nettie makes it clear that our tadpole is not changing us into mindflayer. Helsin states that attempt to remove tadpole could trigger the change, and we need to proceed carefully and understand the magic behind before doing anything. As such, at the very least, I think the game makes it clear to the player, that they can take all the time they want. Does it make it reasonable to playercharacter to chill out? I don't think so, but I think there is more to support this behaviour then I originally thought/was the are launch.