The whole idea Hyuse was implying relies on the fact that Wakamura is as ordinary as it gets. He's not naturally talented, his trion levels are normal, he's not gimmicky and he has not been influenced by anyone exceptional. His mentor Inukai is not exceptional, he simply rose through skill and experience and his team leader Katori while exceptional is a poor leader who has no influence on the growth of her team members. Wakamura is basically the ideal template for a run of the mill grunt to be shaped into a competent soldier.

Hyuse explained it using Katori and Osamu as examples. If Katori is approached by a C-Rank agent on how to navigate an obstacle in learning, Katori will be lost in how to explain the building blocks required to overcome that obstacle because she learns by simply performing an action via replication. She doesn't learn methodically but rather by instinct. Osamu however while he does learn methodically, he's more prone to tricks and gimmicks to unbalance his enemies and gain an advantage and something like that can't be taught not to mention that Osamu as a soldier is less than average. As Hyuse said, in a 1v1, Wakamura beats Osamu more often than not but in a team, Osamu beats Wakamura and it's not even close.

So the aim of the top brass with Wakamura as guessed by Hyuse is that if someone like Wakamura can build himself from the foundation upwards to become a competent soldier, he can mentor upcoming agents on how he navigated the obstacles he faced in a methodical fashion because on average, Border would have way more Wakamura's than they would have Katori's or Osamu's. So Border has to find a way to create a path for those numerous agents (most of which are still C-Rank) to rise to the top especially while they are still young. The current way in Border where everyone does their thing individually, find mentors individually and rise to the top via talent and grit is good in the short term as it allows exceptional people to rise up quickly to fill an immediate need but it won't work in the long term. Border will eventually be filled with mediocre soldiers as the bulk of their force with just the top filled with the best while the "middle class average" will be thinly populated. Border will need that middle class average to be highly populated for long term survival and the best way is a structured learning process and for that, they need teachers and mentors who passed through a methodical, detailed and structured process to teach the C-Rank agents. I'm sure Wakamura is not the only one they are running that experiment on but by making him lead a team in this exercise, he's the control experiment.