My example may seem low-value, but I've seen lots of very long and detailed discussions around here about Tesla's "Executive Exodus", which fall into the exact same selection bias pitfall.
I think it's true that Musk went in and tried to save SolarCity by assuming control and changing the course. That was news at the time where it happened. He did the same to Tesla, actually. It's also true that he's always talking about visions.
The headline of this article starts with: "He (Musk) is full of shit".
Why?
Because that's a quote from a single person she interviewed, who is a disgruntled ex-employee of Tesla with a history of ranging against Tesla and Musk (to quote the article "Since then, he had taken to sending Elon Musk emails and point-blank tweets, describing the pain the layoffs were causing.").
(as a total aside, if you've heard about a laid off low-level employee angrily tweeting and e-mailing a CEO of Fortune 500 company (116 to be exact) you would probably think "an unstable person" not "a good subject expert to interview").
Instead of treating "Musk is full of shit" as a fact, she should could ask herself "is Musk really full of shit"?
Should could do it by asking more people what they think about Musk, more Tesla employees, including those that are still happily employed.
This article is clearly sourced from the most vocal, the most virulent Tesla haters (the self-proclaimed members of $TSLAQ on Twitter).
You can easily find even more people very happy with Tesla's products and I'm sure there are plenty of employees who think highly of Musk.
But it's clearly a hit piece, not interested in presenting a balanced account.
The part about Walmart lawsuit doesn't mention Tesla's response (which paints Walmart in a very bad light) or subsequent joint statement from Walmart and Tesla where they make nice.
Your uninformed mother-in-law may have actually had a better handle on things by not being a major fan and not internalizing the Tesla PR response.
I went for dinner to my in-laws a few months ago and my mother-in-law asked if I had heard about the Tesla that caught fire in Shanghai. I said, yeah but did you hear about all the combustion cars that had combusted that day. She had not of course. Didn't even know "normal" cars catch fire. Nothing against her in particular (she had seen it on a mainstream TV news program), I've had similar conversations with coworkers, aquiantances, on social media, etc.