The moment he conceived of the possibility of using lawless pirates as test subjects, Ves eagerly wanted to get his hands on them. The more test subjects he had access to, the more progress he could make towards his study in artificially cultivating high-ranking mech pilots and mech designers.
As long as he developed a method and confirmed it was safe, he could apply it to anyone with untapped spiritual potential. Even if they did not break through on the spot, Ves at least paved the way for them to advance smoothly!
As for those who already developed themselves to an extent such as Jannzi, Joshua, Tusa, Commander Dise and Commander Orfan, Ves might be able to purify their will and spirit even further so that their chances of breaking through their respective bottlenecks increased!
If he completed his experiments quickly enough, he didn't have to wait until he returned to civilized space to foster the first expert pilots of the Larkinson Clan.