I'll use myself as an example...
I had some early success in public worlds, got into MG and coasted the hell along for a few seasons, so I thought I didn't need to learn about the game. Thought I knew everything. The game drastically changed, and I didn't. All the while, most of my teams went in the toilet, and then....meh, I just wasn't that concerned with winning. All the while, people were learning all the little nuances about the game, I was just coasting still, not paying attention.
So soft tanking even had a worse affect -- I didn't really know what the hell I was doing any more once I had the players. And everyone else around had gotten really, really good. Point being...I'm not sure. But it really put me behind the eight ball in two ways -- one, everyone thought I was a hard-core tanker, which wasn't 100% true, but I certainly didn't have a clue what I was doing.
Now I don't tank, but I still have no clue. But I'm getting better. I think the point is, had I been giving a full effort the whole time, I'd even just know more about the game and its intricacies...