Let's agree to disagree then. When someone makes a claim, they must take responsibility for its utterance, whether what they say is 'correct' or not, and regardless of where that claim may have originated.

Passing on misinformation is just as unethical as creating that misinformation to begin with.

The malice that may underlie the utterance is another thing altogether.

As for misinformation being a natural part of the web, it is an inference that can be drawn (whether you meant it to be or not) from the words you choose. Look at the text in your article I highlighted and the immediately surrounding text. It's form is similar to something like "for people who end up finding worms when they're digging a hole..." or "for people who end up finding Noah's Ark when they're digging a hole...."

These statements all imply that both worms and Noah's Ark are likely components of soil; yet only one is actually possible.

This will create a (possibly subconscious) subtext in a certain fraction of the population that misinformation is just a typical part of the web. The key difference between the web and soil is that we have far greater control over the web than over soil.