But the main problem is that it makes a mockery of the game when you have B teams selected at the world cup. Especially when it's an already weaker team picking a B team against a top side so they can save their players for a more winnable game. We're talking about the showpiece of the sport, it should be the best team available every time.
That argument is to completely discount the improvement to nations like Japan, Georgia, and others.
Nations don't get better without public support, and that doesn't happen without getting a focal point, which is the world stage.
The Olympics will be a nice boost there, but there are dozens of other "sports" in the Olympics, so it will be diluted from rugby's point of view.
Rugby World Cup is where some accountant from Uruguay gets to ply his trade against a full professional, and have his fans go fucking wild for him back home, and maybe makes kids want to take up rugby, their parents to invest the time, and the sponsors to invest the money.
Elitism is what holds our game back.