No, that's not true at all. Thought-terminating cliches cause you to stop thinking; they give a quick shortcut that let's you be dismissive. That's what "AI slop" is, when someone bestows the moniker on a piece of prose that has "It's not this, it's that" in it.
Look, there's is a wide variety of work being produced with AI, all the way from exceptional professional work to total trash done by amateurs. Painting all over those efforts with the same brush of "AI slop" attempts to avoid the thought necessary to process the nuance in each individual situation. In fact, folks that use "AI slop" enjoy being able to dismiss AI output as quickly as possible; they seem to be quite happy to forgo whatever insights might be present in such work. But let's not for a moment pretend it's not a crappy heuristic.
Through this lens, dunking on a piece of prose because it has some trace of LLM processing seems both useless and uninsightful, which is why I'm rallying against it as thought-terminating. Do the thinking to determine whether what you're reading is valid. Saying that it has tells that an LLM might have contributed is not sufficient evidence to do that, and it's also something anyone can do, it requires no skill or insight, and makes for boring discussion. Zero curiousity, 100% dismissive.