Such interventions do not create a conflict with price stability in the presence of a deflationary shock, as shown by the PEPP episode. But even if liquidity crises occur in high-inflation periods, tools can be designed in a smart way to ensure separation.
This requires that the tools are targeted and temporary, and that the underlying issue is truly one of liquidity rather than solvency. Monetary policymakers cannot address solvency issues, which are clearly in the realm of fiscal authorities. In fact, by doing so, they would risk overstepping their mandate and endangering their independence.