There have already been multiple attempts at building personal flying vehicles, but none were financially successful.
Fallacy Of Previous This
The historian's fallacy is an informal fallacy that occurs when one assumes that decision makers of the past viewed events from the same perspective and having the same information as those subsequently analyzing the decision.
Building the necessary infrastructure for casual aerial transport and traffic control would be extremely expensive and complicated.
Appeal To Belief
Argument from ignorance (from Latin: argumentum ad ignorantiam), also known as appeal to ignorance (in which ignorance represents "a lack of contrary evidence"), is a fallacy in informal logic. It asserts that a proposition is true because it has not yet been proved false (or vice versa).