Government runs a lot of businesses alongside private estates. Postal is the biggest example. Why is this super unusual? I don't know if it's middle of the road

Government runs a lot of businesses alongside private estates. Postal is the biggest example. Why is this super unusual? I don't know if it's middle of the road, but I don't think it's socialism. Progressive ideas would be price controls on groceries to curb inflation, or seizing the means of production by making a major stake in a major food chain. (side note: I think it's hilarious that Trump is doing this with Intel and potentially Tiktok and few have labeled it as such).