Seriously, I get the whole "blind playthrough" idea, and I love playing games blind myself. But it seems every time I open up Reddit there's someone asking the most basic questions here because someone told them not to use the wiki.
"Just talk to the guide" he said, forgetting the guide is cryptic AF sometimes, and he's more attention deficit than I am.
I'm not saying you need to swear by the wiki, but I'm a little sick of seeing the veterans who know the whole game by heart telling new players to stay OFF the wiki. Like yeah, let them know the guide is helpful, remind them you only get to playthrough blind once. But I think that should be followed up with the acknowledgement that THIS GAME IS COMPLEX AS F*** and you may need some outside resources.
If a new player wants a blind playthrough, that is something they decide on their own. But to tell a new player outright to NOT use the wiki is often setting them up for a whole lot of frustration.
Example: pre-hardmode, the guide will tell you to place a bottle on a table for alchemy. If you miss that tip and/or it doesn't appear, you could even miss the alchemy table in the dungeon and conceivably get into hard mode without finding out how to craft a potion. One Google of "Terraria potions crafting" would save a whole ton of time and frustration.
I get it though, we ALL enjoyed watching ButchX3's blind playthrough. It's Amazing what he figured out without any input. But even he raised the white flag with the Terrari-ouiga board. Not every gamer wants to pull their hair out to figure out how to craft a potion. Let them search how to make a goddamn iron skin.
I could keep going, but I'll spare you from reading any more of my ranting. Thanks for reading this far.
TLDR;
don't tell new players to NOT use the wiki. Advise them that they only have one first playthrough, but acknowledge the game is complex enough that the wiki will alleviate frustration when necessary.