Obviously it would be terrible if everyone posted 'I agree' comments, that's the point. Numbers show the viewers sentiment towards a comment without clogging the thread.
It is self-evidently true that removing visible comment scores mostly removes methods for trivially measuring "viewer sentiment". It is the contention of those in support of non-visible comment scores that trivial measurement of viewer sentiment harms, rather than aids, discussion. You have made no argument against that point.
