Those who post in blogger.com or medium.com don't have any responsibility to anyone. I think your opinion spreads the "they are all the same" message that is infantile.
2) is the study well-designed and big enough to detect the signal as being reproducible and significant?
3) did the study ask the question it now supposedly answers?
4) did the study employ methods that discriminate precisely and robustly, like use of random groups and correction for complicating variables? Or is it based mostly on observations? And did it overlook the a priori distributions of variables known to confound the outcome of interest?
If the article/study does not pass all these tests, it's unworthy of trust as an accurate test of its hypothesis or its claims of significance.
"I think the world is flat", is an opinion. You could say its accurate in so much as the subject of the sentence actually believes it. However, most people would say the "opinion" is wrong.
In most cases, Forbes contributors (not staffers) receive the same amount of fact-checking as Medium/Blogger writers: zero. Forbes has tarnished its brand so much with its contributor system that clinging to the Forbes brand as a differentiating factor would be the "infantile" opinion.
https://www.poynter.org/reporting-editing/2012/what-the-forb...
https://www.poynter.org/reporting-editing/2012/what-the-forb...
https://www.cjr.org/innovations/newsrooms_boost_traffic.php
Most articles on the Forbes website are by contributors.