When humanisation makes sense
On your own text that sounds stiff: a theoretical part written to a standard, a chapter translated from sources in other languages, or text you wrote with AI as an assistant where the rules allow it. The rewrite gives it a more natural rhythm and leaves the content as it is.
It does not help where the rules forbid AI or require you to disclose it. Text generated by a model is still text from a model after the rewrite — Charles University in Prague states in its recommendation on final theses that undisclosed use of AI can lead to a negative assessment at the defence or to disciplinary proceedings.