'Unprofitable' in the Bible

But avoid foolish debates, genealogies, quarrels, and disputes about the law, for they are unprofitable and worthless.

So the previous command is annulled because it was weak and unprofitable

Obey your leaders and submit to them, for they keep watch over your souls as those who will give an account, so that they can do this with joy and not with grief, for that would be unprofitable for you.