Advising someone to write well has not ever worked, to my knowledge. You can advise them to give it their best, to try harder, to explore further….but neither you nor I can admonish someone to be good at what they do. Anyone who writes a blog can call themselves writers, but that doesn’t assure a professional polish of their work. It has never been a case that quantity leads to quality, but there are surely lessons we can learn along the way.
Some writers bore me to tears; others inspire me. Most critics probably don’t dwell on method, but on product. Of course, I’ve had lots of critics of my own contributions, so I have come to realize that our own opinions of our own works are not fungible.