Because they don’t care about profits, they always end up overpaying and taking way longer time than necessary.

And who pays for that? The whole society: Either the government raises taxes, gets more in debt, or they print more money driving inflation up.

The most basic commodity, food, is a great example. The moment the government has ever step into controlling production of food, we’ve only seen subpar performance and starving people as a consequence. Ultimately killing millions (USRR, China, Korea…)