I think the distinction here is if people are slacking, or if in some cases people just aren't that good or still learning. If someone is slacking, then yes, something should be said. But what if someone is still learning? I've seen people like that get ripped into, because they're not practiced enough to run at 100% efficiency. That's kinda the buffer. Dead weight deserves to be growled at, but at the same time some people doing their best aren't going to be able to perform at 100% efficiency.