Everything you say on the futility of participation at the consumer level is as true of the corporate or the political (whether ballot or revo) levels.
False.
The dynamics differ offering different capabilities (and failure modes).
Markets respond principally to supply and demand, as well as monopoly powers.
Politics responds to political influence, votes, political contributions, and public discourse, but is regulated by legislation, constitutions, common law, precedent, tradition, and other factors.
Each has failure modes. For markets, externalities, fraud, coercion, #GreshamsLaw, #JevonsLaw. These all work directly against "personal responsibility" reforms.
Politics suffers from corruption, influence, capture, and other factors but at least presents a different set of mechanisms for correction than markets alone.
Maket failures aren't resolved by marketng them harder.
Political and regulatory change aren't easy, simple, or guaranteed. But the represent capabilities markets and "individual responsibility" alone simply do not and cannot offer.