Even until today, no country on this planet earth follows a truly pure laissez-faire economy like the one often associated with Adam Smith's ideas. Ever since the Industrial Revolution, even countries known for having free-market economies have never just left everything to the market but they do intervention.
In practice, governments and central banks have always stepped in when needed. Governments use fiscal policy, such as taxes and public spending, while central banks manage interest rates, the money supply, and tools like quantitative easing (QE) and quantitative tightening (QT) to keep inflation under control, support employment, maintain financial stability, and help the economy grow. The recent clear evidence is during the COVID-19 pandemic. Let alone if you take into consideration of political aspect. No single party or government in power would want to to be blamed to cause recession, depression. They know the tools such as QE/QT buying government bond, increasing/reducing money supply will only work temporality but that is enough to might help them win in the next general election.
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