@greatpath I think it's says Don't complain without alternatives sounds like an equivalent to saying "Don't need anything until after you've invented it." and "Make all of your solutions yourself." Neither is very practical.
Don't complain without alternatives" is simply a hifalutin' way of saying "stop whining". Reasonable, rational, substantiated, and comprehensive critique is fine, whether alternatives are presented or not. When the criticism becomes inflamed with emotion, or repeatedly cycles through the same arguments with no new material, it becomes tedious and irritating.
Great quotes thanks for sharing with us!!
Thank you for your well thought out comment.