I wrote a contract proposal a few months ago and I absolutely did a few rounds with an LLM to get the result I wanted. Anyone applying for a job should be doing this with their cover letters. You know that HR has a pipeline set up with a prompt like "here's the job description, here's the candidate's info, rate the candidate on a scale from 1-10" so you can do the same and learn how to boost your own signal. I have zero qualms about doing this.
As for "verbiage", I guess that's too bad, I'm going to continue using it anyway. Interesting factoid about the word though. I will say that "utilize" is one of my pet peeves (99% of the time the word you actually want is "use") and I've excised it from my spoken vocabulary, but I like(d) how verbiage rhymes with foliage so I'm more reticent to give that one up.