I was amazed by the concept of free markets when first learning about it, and it seemed like letting market forces play out should result in an optimal situation for consumers, though now I am more cynical and mostly expect bad consequences like monopolists putting effort into not allowing competition.
So due to the different nature of efficiencies and inefficencies of state and private actors, I currently prefer a system where the government is very involved in key areas of human rights, social welfare and basic needs (so education, healthcare, welfare payments, management of physical/mental disabilities, the justice system), and the private sector is mostly handling technical innovation, consumer goods, manufacturing, most services, etc.
Hopefully we've not yet reached the global optimum of these systems and can see both government and markets evolve positively.
Markets are good at preventing this because they separate the requirements (the customers) from the solution (the producers) and provide a Darwinian process to optimise for the best performers, but markets have their own problems and inefficiencies that make them a poor fit (like markets' tendency to ignore customers with unique or rare requirements, meaning people with rare diseases or multiple problems get rejected or priced out by medical markets). There are market-oriented solutions that libertarians propose, such as evening out costs through medical insurance, but markets will always leave cracks people can fall though (such as those who cannot afford insurance, or immigrants with pre-existing health conditions) and introducing state mandates into the market often fundamentally break the market itself (see: US health insurance market). State legislation leaves cracks too when written badly, so neither is a perfect solution in practice. I don't have a solution to these problems because I think they're rooted in patterns of thinking rather than systemic design, but they're interesting to think about.