Federal mission agencies, including the Centers for Disease Control and Prevention, Department of Energy, Environmental Protection Agency, National Institute of Standards and Technology, National Oceanic and Atmospheric Administration, U.S. Department of Agriculture and U.S. Geological Survey, play different but equally important roles. They conduct and support science that informs decisions affecting public health, environmental protection, energy security, economic development and public safety. Many of these activities generate public benefits that market forces alone are unlikely to adequately provide.
Scientific leadership depends on people, institutions, infrastructure and knowledge. These assets accumulate slowly over decades but can be weakened surprisingly quickly.
The current debate is not merely theoretical. Funding reductions, workforce losses and disruptions affecting universities and federal agencies are already reshaping parts of the American research enterprise.
Things like this make much more sense when you realize right wingers have a different definition of truth than you do.
Truth: statements describing observations of shared experience. (I know there are more complex definitions, but this is sufficient for my point.)
Truth (right-wing): statements describing observations of shared experience that do not contradict claims made by the upper-echelon of their in-group (e.g. MAGA).
So what they mean by a golden age, is an age where the info these agencies distribute is completely controlled by them and is useful to their ends (i.e. domination).