It can cut both ways. This year, a self-rated player on my 4.0 team got bumped to 4.5 and DQed by the computer after the last match of the season.
My team won its group at Districts, and then, in the finals, surprise, surprise, found ourselves facing several "computer-rated" 4.0s at least as good, and in two cases, better, based on what I saw, than our guy who got DQed.
So, the all-infallible computer (remember, there is no appeal for a computer DQ) either erred when it DQed my teammate, or it erred in allowing those other guys to keep playing 4.0. Not that USTA would ever admit to such a thing.
Don't get me wrong - I like the NTRP system in general. It, or something like it, is necessary. And I understand that having the computer handle the heavy lifting of determining rankings is necessary.
What I object to is having the computer be the sole authority, with no human oversight. It's obvious that the black box logic is flawed, and that the computer is being successfully gamed.