I work in a top silicon valley adtech company and I interact with Tableau daily,not to mention we hire some of the smartest data scientists, engineers from top universities, from google, from facebook, etc, and I still find what you do to be extremely hard to believe. I'm not a hater, I wish people to do the best, I've helped placed people in companies, but I don't want people to think they can completely make shyt up and get a high paying jobs, without at least getting caught.
I can literally talk tableau, data visualization, salesforce, crm, cognos, datarama, APIs, all day long and I have a very very hard time believing that tableau is a 200k skill, it's more of a 50k skill that any junior analyst should have.
Also, media mix modeling cannot be done with tableau, that's baby stuff. Tableau cannot handle something as complex as MMM. I literally done this myself for a major agency 3 years ago with an entire team of data scientists with PHDs and even the PHDs did not earn 200K. I guess things changed, more power to you.