If this is counter-intuitive, a refresher on basic statistics and probability theory may be in order.

I'm not running "statistics". I'm running an individual run. I care about the individual quality of my run and not the general quality of the "aggregate".

The problem here is that the difference may not be immediately observable. Sure, if it doesn't give a correct answer, that's quickly catchable. If it costs me 10x the time, that's not immediately catchable but no less problematic.