If it does not do harm to the user, is it okay? Depends on your definition of harm.
The libre argument would possibly be along the lines that it's not harm that registers with the user, but is still harm none the less.
Those who live by the market can be manipulated by the market. In other words, it's only when sales of proprietary solutions fall dramatically in favour of libre solutions that 'proprietary' will fall from favour, so consumer awareness is vital and that can only happen through people finding out from others that there's a better alternative.
