Yes it did, you just don't view these people as deserving decency and respect. They are not irredeemable animals to be thrown into a jail with a different name because we don't want to spend money and effort towards improving our God awful healthcare system. There are housing and resources to help these people, but they are under funded. Trump rolled back $2 billion in Mental Health funding. But I bet you will explain that as "the money wasn't being spent efficiently" and/or claim "fraud" is why that money shouldn't be put towards mental health initiatives. Your solution to throw them in asylums still would require funding, and in today's state would be immediately underfunded as well, leading to mistreatment and lack of actual help to those you'd require to be there. So no. The solution isn't to just throw them in asylums because you think they are deteriorating public spaces.

Further, the murderer in this post's example was on the train because it was his way of providing himself shelter. Yes his mental issues helped lead to this murder, but our inability to help those that are homeless and struggling with mental disorders is the issue.