I mean it is a problem for researchers though. The blatantly fake paper mill ones (which seem to be the topic of this article anyway) aren't, but scientific fraud or even just minor misconduct from people that know how to mask it can waste a great deal of grant funding and scientist time to figure out.

Like look how many times that 2006 Nature paper on amyloid beta in Alzheimer's was cited, turns out some of the images were completely fabricated.