Because the only good science that exists is WHAT GETS RESULTS FOR YOU PERSONALLY.
Anything else is just a theory of what ~might~ work for you, based on statistics, usually from ill-conceived, badly executed, extremely low population non-randomized non-blind studies. And then passed off as "good science".
Apart from that, if a perfect study shows 99% of people benefit more from doing X, but you are the 1% who benefit from doing Y, then you should try both X and Y and work out what works better for you. But you should try X first because the odds are in your favour.
Don't get me wrong I am not attacking the ideas of nutrient timing nor the tests. I am just trying to emphasise the most important point that you must see if it works for you and if it does, use it.
Also I personally find that the occassional workout without pre or post nutrition does wonders for shaking up the body. That is just me. And it does take longer to recover, I believe. Usually adds a day to recovery I think.
Also it probably depends on the workout you are going to do. If doing low reps and maximum effort, it is a big difference to say 20 rep breather squats that make you want to puke - do you want food in your belly at that time?