I feel essentially the same way about this as I do about squirting ie it's a little skeezy for me and does nothing to make my needle move. I acknowledge that people who like this do actually exist.
I'm fairly certain that if an individual ingests enough of this (tit milk) it presents a significant risk of infection. If I liked it I would do it anyway.
I wonder if this kind of thing is more (or less) potentially hazardous than barebacking. Barebacking is something I love very much and am willing to assume some risk in order that I may fully enjoy the experience.