Yeah, usually I would agree with you 100%. Except that it does mean what it means in the strict English definition, enlarged in numbers. Clear communication for the win, hey!
And yet there is no concern about dieing from a critical craft? Why? Because in context of this game critical craft means doing better than normal. We ignore any of the strict english definitions either having to do with criticism or medical problems because we know what "critical" means in this context. Context is always important.