Thanks for the reply. I guess I will hold firmly in the motte then. I think it is bad form to suggest playing a different game if someone is asking to do something in a particular game (regardless if they have started a campaign or not). I've no need to hide back in the bailey. I understand others don't agree with that, but I am comfortable in my opinion. It holds to my views of decency and respect. Note, I have been known to cross those lines once and while myself, it happens.
Also, regarding the OP: it specifically gave an example of the bailey (playing in an Eberron D&D game and running a heist), so they were not up front about taking the narrow definition to begin with. That should have been obvious to anyone who read the post I think.
For reference here is the last paragraph of the OP:
Okay, for starters, I know it's new to you, but you've swapped the difference between the motte and the bailey. The bailey is the lightly fortified, good land that you want to live in, and the motte is the hillside fort that you defend when the bailey is attacked.
Secondly, the OP's opening paragraph is as follows:
So, there is a lot of traffic on the internet dedicated to the idea that DnD is a very limited game, and if you want to run a heist or have romantic fantasy narratives, or even just play a game where bonds with other people is very important, then you should play some indie game that is built for that thing, rather than D&D.
This is the bailey. That the OP also included a shout out to the future motte position doesn't change that it opens with the bailey argument that it shouldn't be okay to recommend other games.
Finally, if you are really establishing that it shouldn't be acceptable to recommend other games, okay. I guess you will continue to be disappointed in life. Because, and here's the thing, someone else may be thrilled to have a game they weren't aware of recommended to them and then go on to have a great time with that game, or just learn something about what they like with a broader set of experience. The demand that no one should be recommending other games to you because you're happy with 5e is not something I find remotely persuasive or worthy of modifying my future behavior to accommodate. I mean, don't get me wrong, I'm actually happy you've found your niche and enjoy it -- happy gamers improve the hobby. But, I'm not willing to accept that your preference is sufficient.
In the meantime, I will agree that it's less useful to recommend playing a different game when you've established that you're already running a 5e game and are looking for pointers to how to do something in an upcoming adventure. That advice is not very helpful. Recommending looking at how another game does things can be, but suggestions you just play the other game are not. The motte argument holds water. The bailer can go do whatever baileys do on the weekends.