Direct answer
Not always: homes may not have the familiar solid fences, and plot boundaries are sometimes marked with barbed wire. Therefore, the appearance of residential areas may differ from what people accustomed to enclosed plots expect.
For renting or buying a house, it is important to examine the actual plot boundary, access, parking, and adjacent areas. A map, a fence, and actual land use do not always line up, especially if the plot is old or located outside densely built-up urban areas.
The absence of a high fence does not by itself determine security or privacy. You need to evaluate the street, lighting, locks, entry, distance to neighbors, and how the house is used every day. Then whether or not there is a fence becomes part of the overall housing assessment rather than the sole criterion.