Describing all the ways experts got it wrong is a thriving cottage industry. Expertise is itself contentious, as conventional expertise legitimized by credentials, prestigious institutional positions, scholarship, prizes, etc. can be wielded to promote the interests of the expert or whomever is funding the expert.
Another segment of experts are self-proclaimed, essentially substituting an air of confidence in their own projections for actual expertise.
Yet another segment of experts are lightweights with a misleading veneer of legitimacy to cloak their real identity as paid shills for corporations or other self-interested parties. PhD, anyone? Just put that PhD after your name and then pontificate about subjects completely outside your field.
Accurate.