Yep there is things like the WCC and CC, and agree player welfare is an issue. But you are then faced with the question of what should the RFL do. Reduce the number of games in the regular season to accommodate the "showcase " games like WCC of do they think of the regular fan, the majority of which don't give 2 figs about the WCC unless there team are involved.
The CC has already been ruined by the seeding system, for me I hope the RFL look at what the average fan wants, and I would suggest that dies not include sacrificing the domestic game in the vain hope it will improve the international team.
Players play too many games in the view of some! I remember the times when a lot of players played winter in UK then went to Aus and played there winter then came back to UK and carried on without a break, not saying it was right but it happened, and I would suggest in that period our international team had more success.