What would they need to feel remorseful about? Automating a video game? It's not like they're breaking the law... I think bots are the least harmful type of cheats anyway. I remember my first intro to programming was modifying Action Replay codes for online NDS games, that was fun but I ruined many people's games doing so. I do kind of regret abusing it like that in hindsight but I would do it again given how formative the experience was.
I would prefer if someone from an online game company could give their viewpoint; I think they could give a more understandable explanation than I could.
Well in this case they killed the game trying to remove the incentive for botting and then switched to a microtransaction model. Excessive botting makes player experience worse without at doubt but at heart I don't think you can actually just outright compare it. At its height the black market supported many people in a much more serious capacity than as a pleasure exploit for the masses.