This is what a telescope sees when Starlink crosses it's view during an observation. They have a picture of what they look like in the article too btw...
I don't deny that under certain conditions it can appear in images. But these conditions need to be weighed in while discussing the merits on this issue. And the article is silent on this.
From this image it looks like they'll be visible pretty high in the sky so it'll be an issue over a significant portion of the sky. If you've ever looked at the ISS that orbits below the Starlink constellation so it's more in the Earth's shadow than the Starlink constellation will be and it's visible all over the night sky.
https://www.scientificamerican.com/article/spacexs-dark-sate...