This is hardly an original insight. Lots of other people are posting this exact advice. But I want to emphasize it because I just passed on linking to a page for like the 10th time this week because it included a big genAI hero image which looked like absolute shit. Scanning the article briefly it actually looked pretty good, it did not read like LLM slop, but it is a reputational risk to link to something that will give readers that immediate negative impression, and it's not worth it.
As a reference, one of the best and most prolific writers that is (relatively) positive about genAI tools has a website that looks like this: https://simonwillison.net . Please observe the amount of genAI art that he is using for punch-ups or hero images