It is the overuse of such tells. Please, let's not ban uses of not X, but Y completely. It's a rhetoric technique that is completely fine, with moderation. But real human will use them with moderation.

Also, there is the issue of human language taking some 'tells' because they are exposed to LLM output a lot.

I'm still grumpy that LLMs made it nearly impossible to use the words 'delve' or em-dashes without getting called out as an LLM.