Key phrase "public good". Sidewalks, roads, utilities are projects government will pursue eminent domain. Giving you access across private property might be for public enjoyment but it's not essential for "public good".
As someone noted earlier; any landlocked public property is the result of government failure to maintain or provide public access during some land transfer or trade.
Not when the people whose political clout or inside info not available to all helps them acquire the land cutting off public access in the first place. Seen both, and it was never supported by the public agency that was forced to sell. But the politicians or rich folks responsible sure want you to blame the agency!
