The report is slightly misleading. My interpretation is that the captain thought that the decision to reject was a good one. Well in the words of Mandy Rice Davies he would say that wouldn’t he? Regardless of his IP status the decision to reject post V1 was not optimum and not a role model performance for Jet transport pilots. I have flown in / out KTM many times and the weather reports were not particularly threatening. The nasty thunderstorms normally occur in the afternoon. As a pilot it is better to take ownership of mistakes. An RTO above V1 is never likely to end well. The Boeing FCTM gives excellent guidance on this. The points ref startle and circadian low are well made. The loop closes on knowing sops and procedures to countenance the threats. Fortunately the outcome was not worse.