Sure, table rules can set a reasonable standard for the given group. But that standard cannot be applied to other tables, nor can they be said to be part of the actual rules of the game.
Now, if I had too much spare time, cared more about it, and didn't hate one-true-wayism, I could actively try to goad people into debating whether the game of 5e should actually be called a Role-Playing game or a game that's a house rule or two away from being a Role-Playing game.
But there are more important things on here to debate (like the definition of a Sandwich!).