Although changes to Suguru Geto's crucial turning points in fate had prevented him from walking all the way down the dark path of corruption, in reality, it could only be considered a postponement. Aside from psychological factors, physiological factors made up a massive portion of his burden as well. If the problem of the cursed spirits' taste was not resolved, corruption was still only a matter of time for Suguru Geto.
If you do not explode in silence, you perish in it.
The sensory devastation of that tastebud-torturing landmine was purely akin to dancing back and forth on the edge of death (and corruption).
Chapter 347