Marketing is made so they you identify with the product or identify with an aspirational version of yourself. Gaming is seen as heavily male-dominated. Expanding that is smart.
(And yes, I know why you're asking and what answer you're looking for.)
IMHO there isn't a realistic "typical gamer stereotype" anymore
sure you can pick any of the past stereotypes and will find people like that, even many, but it's not "most" or even "a slim majority"
Games, and with that Steam, have spread through all of society and Steam is the most wide spread platform for it.
So whatever anecdotal data you have based on your local environments selection bias is probably not "overall representative", just a slice of one of the many many different kinds of people playing games bought from steam.
Unfortunately I usually meet gopnik and niño rata in Dota and CSGO and not typical young nerds from Seattle
It's not my point, but I don't think you're giving a strong rebuttal either.
I'm very curious what you and others think the average Steam user really looks like.
Most of those are probably NOT plugged into a TV, so in that way I agree that these are not typical Steam users. That's why the Steam Machine was developed, to bring gaming back to the couch in a way that the Steam Link didn't succeed at.
Also in the way that the Ouya didn’t succeed at - their kickstarter tagline was “Cracking open the last closed platform: the TV”. I actually had completely forgotten about the Ouya, but the wording of your comment made me go look it up.
https://www.kickstarter.com/projects/ouya/ouya-a-new-kind-of...
Games are so wide spread through all parts of society and Steam is the largest platform for them, sampling 100 people is fully non representive.
Whatever stereotype of two people on a couch you pick, there are not just thousands but more like many 100,000ths to millions of people not matching the stereotype at all. I mean think about it steam has daily active user numbers in the multiple tens of millions.
My best guess is, the people on the photos are related to whoever created the photos in some arbitrary way. It's a pretty common practice when you need photos like that and have no need for "professional actors/models". Like employees of you or who ever you might have hired to do the photos, or some of their friends etc. You still need to sing a simple contract but it's much less time intensive, complicated and annoying to do.
if you sampled 100 blackberry customers at random, they'd absolutely hate a software keyboard
and so on