I mean, that would be a problem for me. Not that I'm forcing you to read anything, but I usually have a ten minute chat with my opponent before the game (often while setting up) where we explain our armies (and their backstories), point out who our commanders are (and their backstories), and any cool and unusual models we have (and their backstories). Then we hash out where and why we are fighting. If my opponent says "I don't care, let's just play", it's probably not going to be a game I want to be in.
Edit: also using model rules from older editions is often completely fine in the club I usually go to, if they are halfway compatible. I.e. bringing your fifth edition codex to a sixth edition game, even if you got an update, because you didn't like that update. Or just saying "I'm playing named character X, but he didn't get rules in this edition, so I'm using his rules from last edition." Perfectly fine.