It's interesting that this is an actively managed fund. There are actually a few indices for this kind of thing but apparently Vanguard is not using them: https://www.msci.com/esg-indexes
VFTSX
It's not actually closed. Just buy the admiral version instead, same thing but cheaper.
All are open. The old Social Index Investor shares are closed.
Which is true, because all forms of hiring are discrimination. Business discriminate against people who don't have the qualifications that they believe will positively impact their business.
If the user you responded to has reason to believe that a certain company has hired certain individuals who are not qualified to do the job they were hired for, I encourage her to say that. But it's not enough to say the practice is blanket good or bad. There are just too many variables to account for.