From Yan Liuyuan's selection of Jinguji Maki as the Jindai internal test player, it appears that this god's brother actually wants to destroy Jindai.
Otherwise, why would he choose a person who inherently suppresses Onmyoji as an internal test player?
The person closest to a god in the current generation, although he hasn't said anything, has already made his stance clear.
However, the existence of someone like Jinguji Maki also indicates that the time for internal test players to arrive in the Outer World isn't the same; at least, Jinguji Maki's and Qing Chen's are different.
Qing Chen suspects that not only is the timing different, but some internal testers might not have their memories sealed, or they might even arrive in the Outer World already as Transcendents.
Everything is possible.
Of course, not all internal test players will choose to change this world like Qing Chen; some may integrate into this world and be assimilated by it.