The theorists who have written books on the topic are not classicists or well-renowned scholars. John Crowe was a civil engineer who studied Ancient History during his retirement. This certainly creates some suspicion, particularly because of the lack of widely circulated information about this theory in the field of classics.
Some of these claims criticise elements of Hisarlik's topography, but it is important to remember that Troy existed thousands of years ago and the topography has changed enormously. Even with some knowledge of how the landscape has changed over time, it would be impossible to know exactly what Troy and all of its surroundings looked like. Even Homer described Troy hundred of years after the war, so may not have been accurate.