Basically, this. I understand the sentiment from people who can't play often that they might end up behind in terms of cards, but there has to be a line drawn somewhere. Person A can only play 5 hours a week but wants to be able to build a competitive PvP deck really quickly. Person B can only play 2 hours a week but wants that same competitive deck despite playing less than half as much. Otherwise you might as well just give everyone every card at their first login.