Here is what I think is going on.
Konami is a Japanese company acting like a Japanese company traditionally does. You bow to your exects when they walk the corridors, you are forced to drink at their parties and laugh at their jokes no different than any other salary men and their punishments are no different. They don't see themselves as a creative studio but a corporation that is no different from others in Japan and thus proceeds with their actions based on numbers and traditional Japanese corporation tactics, not as a studio providing a creative product. This is why, I think, they simply replace people with talent with any other, why they think all jobs are easily fillable, because in any other corporate environment they are. Composer is no different than accountant and to them the most talented horror composer in modern gaming is no different than the most talented accountant, plenty of those looking for work.
They don't care about our opinions of them, they probably got mail like this back when they were popular so to them nothing really changes. They are, I theorize, an archetype of corporate Japan. They aren't like other studios who see public reactions and act on them, they follow the money and they will bury and burn all of their IPs before seeing others profit from them because they are not beloved franchises to them, they are products and properties, so unless they start to go bankrupt they won't sell and all of the good things that came from them won't come to light again in the same form we once knew them as.
I know they've bullied employees in order to get their way, not crossing the line to illegal actions, so I know that they know what they are doing is unethical but I think that the only way for them to change is for them to go near collapse as a company, ask why this is happening and been told straight out because you are scum and this is the consequence of your actions. That's not going to happen, though, the world isn't that ideal, it's downright wishful thinking. They are provably financially secure within their other endeavours in aspects of business where those consumers don't give two 5#!ts about their gaming woes so they will probably prosper for this, despite their less than human behaviour. Honestly, I don't know if what they're doing is illegal in Japan, despite what I said, but I think that if it was they would've seen the legal replications already leading me to believe that it isn't, just unethical.
I don't know if Japan is still full of companies that are this way but I know it was back in the '90s. While it's hard to justify anything that we know of Konami's actions I do know that even if there were companies like that it wasn't all tyrannical industries that seemed downright villainous, there was a bright side to it. It wasn't just a bad life been in a Japanese corporation. Yes, the life of a Japanese salaryman has always been notoriously difficult, and I wouldn't be surprised if Japan's above average suicide rate is in some way related to their jobs and the stress it generates (though I understand school life is even more so), but even then I can't imagine Konami been an example of standard working conditions of corporate Japan, at least I hope not.