This is true, but the flip side of the same coin is that it shouldn't necessarily be the Transit Authority's responsibility for treating the consequences of mental illness, which is sort of what we're talking about here. As a large-scale investment you'd have a hard time convincing me it was a better, more equitable, or more productive use of money than installing ADA access, improving frequencies, repairing stations, etc. It's a moot point given how limited the scope of possible PSD stations is, according to that report (basically everything with platform-edge columns out of the running, so the whole early IRT, and then everything elevated for weight), but sort of an interesting question to consider.