The "Maid Marian" route the pair were attempting had a difficulty rating of 20 at its most challenging section, he said.
However, based on his knowledge of their skills and experience, they were "capable of climbing at that technical level".
The route had been climbed twice before, each time by an NZAT mentor, Daniel Joll, with a different partner, so they would have had an "intimate knowledge" of the conditions and challenges they were expecting to encounter.
Given their intention to bivouac overnight between the lower and upper sections of the climb, and the fine weather at the time, there were no reasons for rushing the climb.
They were also "well-provisioned and well-equipped".
Smith had climbed routes with a technical difficulty grading of 29, and was therefore capable of climbing at standards "one-quarter to one-third more difficult" than required for Maid Marian.
The NZAT is made up of promising young climbers who are mentored by experienced older climbers.
Smith, of Queenstown, and Chand, of Wanaka, joined the NZAT team in late 2015.
Wayatt said he had no knowledge of the NZAT's structure, culture or recruitment policy, but ''loved the concept'' of mentoring young climbers.
He saw no problem with the team's goal of compressing 10 years' normal climbing experience into three years.
With the appropriate guidance and support, a period of intensive climbing experience could "fast-track" a young climber's development.
"It's less a matter of years ... and more about the quality of experience."
While there was a risk of young climbers being "stretched too far", in his experience that risk could be tempered by regular, ongoing contact with a mentor.
Because there were no witnesses or survivors of the incident, his opinions about what happened were "purely speculative", and based on the equipment found attached to the rope and harnesses used by the pair.
However, it was clear Smith was leading the climb, with about 17 metres of rope between him and Chand.
It appeared Smith had fallen, for an unknown reason, leading to a "factor two lead fall".
That meant he had fallen about 17m to Chand's position, then continued to fall the same distance below, at which point both men were pulled off the wall and fell an estimated 100m.
Two rock anchor devices found attached to their rope had apparently been pulled out of the rock as a result of the load placed on them by the men's fall.
Robinson has made a non-publication order relating to any statements from a report into the incident commissioned by the NZAT.
