Everyone works differently, and not everyone's work gets seen equally. For example, I've never kicked or banned anyone ingame, but I'm constantly active elsewhere in other areas and aspects that people don't see (or even realize exist).
We can't expect everyone to be our perfect moderation drones, because that puts a ton of undue stress on moderators. If that were true, the mods would have to moderate all of the following at the same time: these forums, TeamSpeak, Survival Games, Creative, Survival, The Hubs, the Chats, and their own staff business. That is a nearly impossible workload that no one in their right mind would volunteer to take on all at the same time. It would be great if we could get mods to do that, but that's just not realistic.
We put more focus on ingame moderation because that's where more people are, and where active moderation is needed more often. To be honest, the forums are pretty easy to moderate. It really babysits itself whilst making moderation very easy with a number of tools for us to use. At the same time, there will always be a larger proportion of players ingame than on our forums, so we have more trouble-makers and rulebreakers ingame. That's why we want to focus our moderation duties there.
And plus, forum posting isn't everything. The forums are a source of communication with the community, but the community doesn't revolve around the forums. You don't need 100+ posts to know what it takes to moderate, much in the same way we deny moderator applications with 5,000+ posts because they aren't fit to moderate here.