> if useful amounts of information are neither practically available nor practically actionable, what might that imply about our absolute faith in market mechanisms that require the right information to operate efficiently?

See e.g. Akerlof, George A. (1970). "The Market for 'Lemons': Quality Uncertainty and the Market Mechanism"

Akerlof shared the 2001 Nobel Prize in Economic Sciences with A. Michael Spence and Joseph E. Stiglitz for work on the impact of information asymmetry on markets.