While the well-meaning elderly Master intended to merely break any arrogance that Rui might have had in Martial Arts and make him cautious about the adversities that Martial Art faced, he was taken aback by how well Rui was well-versed in the power dynamics of human civilization.
However, Rui knew had a point.
While the growth of Martial Art had accelerated in the Age of Martial Art, the growth esoteric technology had also sped up due to the fact that Martial Artists were able to overcome many dangers to extract and retrieve powerful esoteric resources that served as one of the reasons that esoteric military technology grew.
In other words, if Martial Art stalled, then that was reason to believe that esoteric technology would stall too.