You just misquoted me again -- distorting my comment. And your conclusion is wrong -- I understand my comment ccompletely. You said he should lose, and badly, by running 1500m at his 5000m pace. I said that that didn't happen. Your prediction didn't come true. That is not all that complicated to understand.
What you don't know, and I do know, is the aim of this race, because Cheptegei told us, in the video of the race, in his own words. This 1500m was just to test his speed. So all this nonsense about wanting to win, or wishing to win, a 1500m, or wanting to lose, and badly, is just ignorance on your part. The goal is to win the Olympics in 5000m/10000m, not a 1500m event in some local no-name meet in April.
What you also don't know, since it is part of modern training, is that one of the important range of paces is 95%-105% of target race pace. Since 3:37 is 96% of pace (time) or 104% of speed, of Cheptegei's 5000m race pace, there is really no mystery, and no need to wonder, why he runs 3:37, and not faster. This is not unlike Lydiard asking to run a Time Trial at 3/4th effort, while saying something wise like "train don't strain", or "finish as if you could run another", or "We train to race , Not race to train."
What you also don't know, since it is a part of modern training, is that training is first INTENSIVE, then EXTENSIVE. This means that running 1500m at a SPECIFIC (104% speed) pace, then some weeks later, a 3000m at a SPECIFIC (103% speed) pace, fits perfectly like a glove, for someone being guided by modern training principles for a 5000m/10000m Olympics in a few months.