He probably does, most people do, in one form or another. Rarely is it as drastic as Hamuko's case, but everyone has experienced it at least once.

"Maruki-san," Hamuko gently beckoned his attention, "This place might be the only way you could meet me, but that's okay. What's important is to appreciate the life you have while you have it. And right now, I get to have it, and I get to meet people like you. People I made that sacrifice for. And I get to see that I made the right decision."