Think of them as 2 methods for determining policy
They’re not though.
Democracy is a strategy some states use to achieve legitimacy in the eyes of the populace. Science is a method for producing knowledge.
Policy is determined by the financial interests of our elites, our global imperial interests, and the form of our bureaucratic institutions.
Democracy, science and policy are three very distinct domains.
“Because” often doesn’t make sense in the real world where anything that happens is the sum total of multiple factors. Especially a trend as broad as enshitification.
Being publicly traded seems like a contributing factor, but a sole owner can still enshitify through greed or incompetence.
I would guess that market consolidation and low competition are more of a factor.