I guess I don't understand your argument. All clans are able to play at all times. All game modes are available on all platforms. No one platform has an advantage. If any of your teammates win a game in a node then you get a point independent of what platform they are playing on.
Please clarify where the "unfairness" comes in to play.
His point seems pretty self-evident. There's not enough players in some of the game modes on the PC to get a decent game going. I've yet to play Hunted because the most players I've ever seen in it is 5 people. I've played maybe 5 games of Blitz because most of the time it doesn't have more than a couple dozen people.
As I type this there is a grand total of 3,383 players in the game on PC with the breakdown being:
Granted, this is 11PM EST, but it's not much better during the peak hours. Considering that the pool of players for any of these modes may be spread out worldwide the chances of ending up in a game with serious lag due to people being all over the place is very high. Particularly when you're looking at 23 people playing Cranked. If I want to play Kill Confirmed I have to go with Hard Core because there's just not enough people playing the standard game.
The only means I can see for a PC clan to be competitive is to add in lots of players who play on Xbox and Playstation even though we'll never actually play a game together. Otherwise we have no hope of capturing the nodes for lesser played game types.