I'm not certain that it's a matter of convenience, but having a 20-minute drive and 7 miles between neighbors seems that the town planning board is not paying enough attention to the plans proposed by various developers. I think that development is fine, but that an oversight committee is a good option to make sure that the big picture is not being overlooked.
Yes, developers are not paying enough attention to convenience. The fact that this happened is a sign that developers need to pay more attention to convenience. If two houses are close enough together that they share a backyard fence, the shortest driving distance between them should not be 20 minutes and seven miles.
Often, when building a house on a tract of land, convenience should be taken into account. However, convenience is not always the top priority. It is possible that these houses are surrounded by large amounts of land and a road that would have cut through it would have ruined the aesthetic of the houses' landscapes.
Especially in an ecological environment such as Florida's, the preservation of native land should be a consideration in residential development. Many homebuyers value land access and privacy over convenience. Such wide open spaces need to be available for those who prefer not to live in a densely populated area. Developers should give homebuyers options, one of which is to live a great distance from the nearest neighbor.