I agree with this but I also disagree with this -- the article itself must be the focus of whether it stands up to peer review. (though admittedly in your case cited above this could be tricksome as we have few lawyers in this case associated with this site)
I don't want to see situations where judgements get made as a result of the experience/inexperience of the article's author excepting in situations where the article itself is inappropriate/poorly constructed/downright stupid i.e. not to the level that we want for Gamedev. I have seen many articles over the years that reflect poorly on industry veterans as well insightful articles from relative newcomers. I agree that some level of author identification would be nice inline with the points you mention, but it should be an adjunct not an imprimatur in of itself.
Also with regard Google searches - they are at best "flawed" in providing information as an example using myself. My real name is on my profile. (NOTE: Please do not redact the following as I believe that this is actually quite relevant in establishing an important point)
A google search will not reveal the following about me:
It will not reveal that I was incarcerated in 1987 and subsequently sentenced to life imprisonment.
It will not reveal that I was released in 2006 on licence.
It will not reveal that I have $40k in Hecs debts from studying a variety of subjects - although I have no degree.
It will not reveal that I am a published author. Though it will do so soon, as I will be publishing finally under my own name.
It will not reveal that I spent 16 years aiding other inmates in the area of criminal law with a high degree of success although I am not and can never be a lawyer.
These are just some small points about myself that can not be found on Google...admittedly my case is somewhat beyond the norm. But and this is the point I am trying to make...I do not believe that the quality of my posts on this site overall reflect poorly upon me. I have no doubt that examples where I have f*cked up can be found --- but this is where peer review comes in and has done so. It is what makes this site so strong (and does not truly pay attention most of the time to the poster's IRL persona) and it should carry into the articles just as strongly. That said I also agree with you that an author bio should exist and it would contribute somewhat to an article's credibility, but it should be secondary to the legitimacy of the article's value in of itself.
Excerpted from Guidelines and Tips for Writing Articles
About the Author
This is a section many like to place at the end of their articles to give background on their expertise to let readers recognize their ability to cover the topic of the article. Please, do not write a full bio. A paragraph at most will give people an idea of your qualifications related to the subject matter. We actually recommend that you leave out this section entirely and instead keep the About Me section of your user profile updated with all of your qualifications. This will save you time from having to re-write this section multiple times or go back to edit it if anything changes.
This could be rewritten to emphasise more strongly the use of an Author bio or profile page in establishing credibility with regard articles.
Oh and if in the oft chance that someone wishes to know more about my past. Bugger off....please