There will never be discussion--ever. No reason, no explanation, not even an attempt to meet halfway. Take it or leave it.
Why does that bother you
so much???
@Oofta invites you to a game, explaining
precisely what his game is like: the world, the history, and details every limitiation he is imposing on his game. If you don't like his views or game, you are free to not play and politely decline. I doubt he would take offense to it.
The same thing happens when a group of people agree to see a movie or eat at a restaurant. They run into someone else they know, and invite them to join. If that person doesn't like that restaurant or isn't keen on that movie, they can suggest an alternative. But if the person who is
paying (such as
@Oofta) doesn't like that alternative, the extra person can simply decline.
Now, perhaps someone else in the group offers to pay instead (i.e. says
they will DM so
@Oofta can play) and now the new person can join and
@Oofta has to decide if they want to settle on the alternative, or break away. Two groups might then form and they go to different restaurants, meet at the theatre later, and all see the same movie, or see different movies, meet up later, and discuss what happened in the movies.
Things like this happen IRL all the time, and that includes playing D&D. For example, I only play D&D. No other RPGs interest me really at all. So, when one of the groups decide to take a break from D&D and play something else for a while, I might do something, join them and just hang out, play D&D with someone else, etc.
That's exactly the kind of thing I oppose. If you have players who put up with that sort of attitude, more power to you.
Basically you seem to imply it is okay for the player to insist on something, and the DM has to compromise, but it isn't ok for the DM to insist on it, and the player has to compromise.
Don't you think the DM should ever "get their way"?