None of the above is true.
1) He happened to grow up in a trailer in Montana, but eventually moved on to attend a good German university, and was no longer living in a "Montana trailer park" while making this discovery.
2) The guy corrected a misunderstanding that people had, regarding one very specific phenomenon found in nature; something that most biologists don't work with, depend on, or care about. The replication crisis around Ego Depletion, for example, can credibly be claimed to have overturned decades of psychological thought. The specific makeup of Lichens though, is an extremely niche field, that doesn't affect the broader field of Biology in any significant way.