I couldn't agree more. Which is why different tables play differently. Not one type of youth table is better than another youth table. One has a DM that wants them to play half-orcs and they do. Another never mentions any parameters, and they play whatever they want. There is no better. The simple fact that they, beginners, can fluidly shift between the two table types says a lot.
And in “my” library program, and my preferred playstyle in general, those things also happen. There seems to be a misunderstanding here.
I think there may be...1, possibly 2, posters who will abide no restrictions, ever, for any reason. Well, rhetorically. I doubt they are so recalcitrant at their actual game table. The rest of us are not arguing that any restriction is bad no matter what.
The all Orc game doesn’t sound interesting to me, as a player, but I have run a game where everyone was some form of mobile gish that could fit in at a magic school and “make the team” for a sport of parkour rooftop/platform rugby.
I’ve played in a game where we were all from one culture and region, but we pretty much never use mono racial cultures, so we haven’t done a single race game as a result, but I’d the concept was compelling we’d have no issue doing so.
The difference is, if one or more members of the group didn’t want to play within that limited concept, we would have a group discussion, and the DM would be expected to be just as willing to compromise as the player. Maybe that ends up at a different concept, maybe the DM notes that it’s a short story campaign, probably 6 levels of progression at most, and the player is down for it on that basis, maybe the orcs are allies with the kenku and the Hobs, and the POW crew is made up of those three races, maybe something else.
If we still had time to play frequently enough to run 6 different campaigns at a time in our group, we’d be more willing to say, “okay, this campaign will just be XYZ players, so we will run it when John isn’t available”, or whatever. We are trying to wrap up campaigns right now, instead, and get down to maybe 3 active campaigns, total. And one of those will be short story arcs rather than a dedicated long term campaign.