Iosue
Legend
Yeah, but this is like telling someone they will interview for a sales position, and they prepare for it by reading up on the company's internal internet servers and office supply chains.It's disheartening, though. It's like you were really excited by this job interview, learned about the company, researched the position, and absorbed the mission statement as your own. And then you get there, and they person you're interviewing with tells you it's a different position, at a different company, and actually all that stuff you read up on is out-dated now.
"Why'd I even read that and care about it, if I can't use it?"
The MM is a DM resource. It has never been, nor presented as, a player resource. If a player reacts, "Why'd I even read that and care about it, if I can't use it?" my response would be, "I dunno. Why did you? I didn't tell you to. The PHB doesn't tell you to. I let you know at the outset that my campaign world is not the default setting of the books."