Tone judgments aside, I think it's okay to be skeptical because spectroscopy is far from an exact science. Reminds me of the sensational "diamond planet"[0] a few years ago that was based on a dubious interpretation of the host star's spectrum.[1]

[0] https://www.forbes.com/sites/petercohan/2012/10/12/diamond-p...

[1] https://uanews.arizona.edu/story/diamond-super-earth-may-not...