But in the climate that @Red was discussing it would lead respected scientists who even had evidence to not attempt to publish for fear of having their reputations ruined by the establishment. Only those who don't care about that would attempt to publish, and likely would be scientists with less to lose and possibly less resources as a result. How can we see they aspect, those who stay silent because of worry about damage to their reputations by the establishment. Or even perhaps professional suppression within their circles preempting any attempts at publication?
The consensus understanding (for example, on "Clovis First") didn't just pop up arbitrarily. It was built on the evidence and the best attempts to understand the evidence. If you want to overturn the consensus, you need to gather enough evidence that it shifts the current paradigm. Rarely can you find that much in a single decade, much less a single paper.
What you can do is publish a paper that presents evidence/interpretations which do not fit comfortably within the current paradigm. There is no particular danger there. You and other researchers will typically take up this evidence and use it to either further disrupt the paradigm or to reinforce it. Over time, the paradigm shifts.
It's also true that young researchers are typically more accepting of changing the paradigms, and that older researchers have the political power. That doesn't mean the young researchers are putting their careers in danger by pushing on the paradigm, it means they have to have their ducks in a row and solid evidence.
Just about every science paper I have read has a section about how the research fits in, or does not, with current understanding, and suggestions for future inquiry. I don't think anyone has their reputations ruined for doing that.