The Jericho route source did clearly state that it would give you Scintillack Snuff, and that it was quite difficult to obtain any other way. It would be nice if there were more misclick-protection, but it’s not as if it wasn’t signposted that that was clearly the option you should take. The existence of the rare success does mean that you can still get it even if you misclicked on your way to Jericho, which is more forgiving than some other things.