James Tour is a legit chemist who apparently puts at least some of his learning aside when he talks about origins of life. He admits that he has become something of a pariah in scientific circles, primarily because of his pushback on research into abiogenesis. I think part of what irritates his colleagues is his clear support of intelligent design combined with his insistence that he is not pushing creationism or any sort of religious viewpoint. Since he's an avowed Christian who is aligned with creationist groups and organizations, it's clear what he is promoting.
Similarly, Stephen Meyer has degrees in sciences other than biology, and his attacks on evolutionary biology are of such quality that most biologists seem content to ignore it, leaving the job of refuting him to countless YouTubers.
I suppose it's possible that the global scientific community treats them as outsiders because they have found evidence that turns the field of life sciences on its head. I think it's much more likely that they are ignored because they're snake oil salesmen.