I do agree that for short term ownership/speculation, it absolutely makes sense from an investment standpoint. Very good point.
However from an investment standpoint at this point in time, it is quite speculative to say that a property will be more valuable in that 5 years. The most common misconception about a market decline is the appreciation rate on the bottom of the cycle.
Yet yes, your point is well taken about the investment strategy to lower carrying costs, and for that you are definitely correct.
Unfortunately many homewowners are not in that boat and get misguided thinking that they will have a markedly higher salary, or the market will change so they can refinance. Basically they get hoodwinked.